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      <titleStmt>
        <title type="main">Wurdahuzdą: Proto-Germanic dictionary — *aistô</title>
        <author>Scott K. Shay</author>
      </titleStmt>
      <publicationStmt>
        <publisher>Wardja Press</publisher>
        <date when="2026-10-01"/>
        <idno type="URL">https://protogermanic.org/pgmc_aistô</idno>
      </publicationStmt>
      <sourceDesc>
        <p>Single-entry extract from the dictionary. Cross-references to other entries point to their identifiers in the full dictionary.</p>
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          <monogr>
            <title level="m">Etymological Dictionary of Greek (Leiden Indo-European Etymological Dictionary Series 10/1)</title>
            <author>
              <forename>Robert</forename>
              <surname>Beekes</surname>
            </author>
            <imprint>
              <publisher>Brill</publisher>
              <date>2010</date>
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          </monogr>
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          <monogr>
            <title level="m">Etymological Dictionary of the Slavic Inherited Lexicon (Leiden Indo-European Etymological Dictionary Series 4)</title>
            <author>
              <forename>Rick</forename>
              <surname>Derksen</surname>
            </author>
            <imprint>
              <publisher>Brill</publisher>
              <date>2008</date>
            </imprint>
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          <monogr>
            <title level="m">Etymological Dictionary of the Baltic Inherited Lexicon (Leiden Indo-European Etymological Dictionary Series 13)</title>
            <author>
              <forename>Rick</forename>
              <surname>Derksen</surname>
            </author>
            <imprint>
              <publisher>Brill</publisher>
              <date>2015</date>
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          </monogr>
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          <monogr>
            <title level="m">The Proto-Germanic n-Stems: A Study in Diachronic Morphophonology</title>
            <author>
              <forename>Guus</forename>
              <surname>Kroonen</surname>
            </author>
            <imprint>
              <publisher>Rodopi</publisher>
              <date>2011a</date>
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          <monogr>
            <title level="m">Etymological Dictionary of Proto-Germanic (Leiden Indo-European Etymological Dictionary Series 11)</title>
            <author>
              <forename>Guus</forename>
              <surname>Kroonen</surname>
            </author>
            <imprint>
              <publisher>Brill</publisher>
              <date>2013</date>
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        <biblStruct xmlns="http://www.tei-c.org/ns/1.0" type="book" xml:id="martirosyan2010" corresp="http://zotero.org/users/21108209/items/EDNDBVND">
          <monogr>
            <title level="m">Etymological Dictionary of the Armenian Inherited Lexicon (Leiden Indo-European Etymological Dictionary Series 8)</title>
            <author>
              <forename>Hrach</forename>
              <surname>Martirosyan</surname>
            </author>
            <imprint>
              <publisher>Brill</publisher>
              <date>2010</date>
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          </monogr>
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        <biblStruct xmlns="http://www.tei-c.org/ns/1.0" type="book" xml:id="orel2003" corresp="http://zotero.org/users/21108209/items/U6EVGQ9E">
          <monogr>
            <title level="m">A Handbook of Germanic Etymology</title>
            <author>
              <forename>Vladimir</forename>
              <surname>Orel</surname>
            </author>
            <imprint>
              <publisher>Brill</publisher>
              <date>2003</date>
            </imprint>
          </monogr>
        </biblStruct>
        <biblStruct xmlns="http://www.tei-c.org/ns/1.0" type="book" xml:id="rix2001" corresp="http://zotero.org/users/21108209/items/TCS87M9Q">
          <monogr>
            <title level="m">Lexikon der indogermanischen Verben</title>
            <author>
              <forename>Helmut</forename>
              <surname>Rix</surname>
            </author>
            <author>
              <forename>Martin</forename>
              <surname>Kümmel</surname>
            </author>
            <author>
              <forename>Thomas</forename>
              <surname>Zehnder</surname>
            </author>
            <author>
              <forename>Reiner</forename>
              <surname>Lipp</surname>
            </author>
            <author>
              <forename>Brigitte</forename>
              <surname>Schirmer</surname>
            </author>
            <imprint>
              <pubPlace>Wiesbaden</pubPlace>
              <publisher>Reichert</publisher>
              <date>2001</date>
            </imprint>
          </monogr>
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      </listBibl>
      <list type="cognates">
        <item xml:id="cog_chu_isto" xml:lang="chu" type="cognate">
          <orth>исто</orth>
          <form type="translit">
            <orth>isto</orth>
          </form>
          <def>testicle; kidneys, entrails</def>
        </item>
        <item xml:id="cog_grc_oideo" xml:lang="grc" type="cognate">
          <orth>οἰδέω</orth>
          <form type="translit">
            <orth>oidéō</orth>
          </form>
          <def>to swell</def>
        </item>
        <item xml:id="cog_grc_oidos" xml:lang="grc" type="cognate">
          <orth>οἶδος</orth>
          <form type="translit">
            <orth>oîdos</orth>
          </form>
          <def>swelling, tumor</def>
        </item>
        <item xml:id="cog_lat_aemidus" xml:lang="lat" type="cognate">
          <orth>aemidus</orth>
          <def>swollen</def>
        </item>
        <item xml:id="cog_lit_inkstas" xml:lang="lit" type="cognate">
          <orth>ìnkstas</orth>
          <def>kidney; testicle</def>
        </item>
        <item xml:id="cog_ine-x-proto_h2eyd" xml:lang="ine-x-proto" type="etymon">
          <orth>*h₂eyd-</orth>
          <def>to swell</def>
        </item>
        <item xml:id="cog_non_eista" xml:lang="non" type="reflex">
          <orth>eista</orth>
          <def>testicle</def>
        </item>
        <item xml:id="cog_xcl_aytnum_x2" xml:lang="xcl" type="cognate">
          <orth>այտնում</orth>
          <form type="translit">
            <orth>aytnum</orth>
          </form>
          <def>to swell</def>
        </item>
        <item xml:id="cog_ine-x-proto_h2oyd_sth2_o" xml:lang="ine-x-proto" type="etymon">
          <orth>*h₂oyd-sth₂-o-</orth>
          <def>swollen organ</def>
        </item>
      </list>
      <div type="dictionary">
        <entry xml:id="pgmc_aisto" type="noun" corresp="https://en.wiktionary.org/wiki/Reconstruction:Proto-Germanic/aistô">
          <form type="lemma">
            <orth>aistô</orth>
            <pron notation="ipa">ˈɑi̯s.tɔːː</pron>
            <form type="runic">
              <orth>ᚨᛁᛊᛏᛟ</orth>
            </form>
          </form>
          <gramGrp>
            <pos>noun</pos>
            <gram type="gender">neuter</gram>
            <gram type="stem">an-stem</gram>
          </gramGrp>
          <sense n="1">
            <def>testicle</def>
          </sense>
          <etym>
            <seg type="p">From a pre-Germanic base <mentioned xml:lang="" target="#cog_ine-x-proto_h2oyd_sth2_o"><ref target="#cog_ine-x-proto_h2oyd_sth2_o">*h₂oyd-sth₂-o-</ref></mentioned>, ultimately from Proto-Indo-European <mentioned xml:lang="" target="#cog_ine-x-proto_h2eyd"><ref target="#cog_ine-x-proto_h2eyd">*h₂eyd-</ref></mentioned> (also reflected in <mentioned xml:lang="gmw-x-proto" target="#pgmc_aitaz"><ref target="#pgmc_aitaz">*aitaz</ref></mentioned> and <mentioned xml:lang="gmw-x-proto" target="#pgmc_aitra"><ref target="#pgmc_aitra">*aitrą</ref></mentioned>), with <mentioned xml:lang="gmw-x-proto">o</mentioned>-grade of the root and an <mentioned xml:lang="gmw-x-proto">-sth₂-o-</mentioned> enlargement <bibl corresp="#kroonen2013" n="14">Kroonen 2013: 14</bibl>. The word was probably secondary in Proto-Germanic: neuter <mentioned xml:lang="gmw-x-proto">n</mentioned>-stems denoting body parts remained productive in Old Norse, so Old Norse <mentioned xml:lang="" target="#cog_non_eista"><ref target="#cog_non_eista">eista</ref></mentioned>  need not continue an inherited PIE <mentioned xml:lang="gmw-x-proto">n</mentioned>-stem <bibl corresp="#kroonen2011a" n="44–45">Kroonen 2011a: 44–45</bibl> <bibl corresp="#kroonen2013" n="14">Kroonen 2013: 14</bibl>. Cognate formations occur in Balto-Slavic: Lithuanian <mentioned xml:lang="lit" target="#cog_lit_inkstas"><ref target="#cog_lit_inkstas">ìnkstas</ref></mentioned> and Old Church Slavonic <mentioned xml:lang="chu" target="#cog_chu_isto"><ref target="#cog_chu_isto">исто</ref></mentioned>, for which Derksen reconstructs <mentioned xml:lang="gmw-x-proto">*h₂id-st(h₂)-es-</mentioned>/<mentioned xml:lang="gmw-x-proto">*h₂id-st-es-</mentioned>, indicating a closely related but not morphologically identical formation <bibl corresp="#derksen2008" n="215">Derksen 2008: 215</bibl> <bibl corresp="#derksen2015" n="202">Derksen 2015: 202</bibl> . The same root is reflected in Ancient Greek <mentioned xml:lang="grc" target="#cog_grc_oideo"><ref target="#cog_grc_oideo">οἰδέω</ref></mentioned> and <mentioned xml:lang="" target="#cog_grc_oidos"><ref target="#cog_grc_oidos">οἶδος</ref></mentioned>, Old Armenian <mentioned xml:lang="" target="#cog_xcl_aytnum_x2"><ref target="#cog_xcl_aytnum_x2">այտնում</ref></mentioned>, and Latin <mentioned xml:lang="lat" target="#cog_lat_aemidus"><ref target="#cog_lat_aemidus">aemidus</ref></mentioned> <bibl corresp="#beekes2010" n="1053–54">Beekes 2010: 1053–54</bibl> <bibl corresp="#kroonen2013" n="14">Kroonen 2013: 14</bibl> <bibl corresp="#martirosyan2010" n="61, 706">Martirosyan 2010: 61, 706</bibl> <bibl corresp="#orel2003" n="10">Orel 2003: 10</bibl> <bibl corresp="#rix2001" n="258">Rix et al. 2001: 258</bibl>.</seg>
          </etym>
          <re type="paradigm">
            <form type="inflected" ana="#sg #nom">
              <orth>aistô</orth>
            </form>
            <form type="inflected" ana="#pl #nom">
              <orth>aistōnō</orth>
            </form>
            <form type="inflected" ana="#sg #acc">
              <orth>aistô</orth>
            </form>
            <form type="inflected" ana="#pl #acc">
              <orth>aistōnō</orth>
            </form>
            <form type="inflected" ana="#sg #gen">
              <orth>aistiniz</orth>
            </form>
            <form type="inflected" ana="#pl #gen">
              <orth>aistanǫ̂</orth>
            </form>
            <form type="inflected" ana="#sg #dat">
              <orth>aistini</orth>
            </form>
            <form type="inflected" ana="#pl #dat">
              <orth>aistammaz</orth>
            </form>
            <form type="inflected" ana="#sg #instr">
              <orth>aistinē</orth>
            </form>
            <form type="inflected" ana="#pl #instr">
              <orth>aistammiz</orth>
            </form>
            <form type="inflected" ana="#sg #voc">
              <orth>aistô</orth>
            </form>
            <form type="inflected" ana="#pl #voc">
              <orth>aistōnō</orth>
            </form>
          </re>
          <re type="descendants">
            <list>
              <item>
                <form type="descendant">
                  <lang>Old Norse</lang>
                  <orth>eista</orth>
                  <form type="descendant">
                    <lang>Faroese</lang>
                    <orth>eista</orth>
                  </form>
                  <form type="descendant">
                    <lang>Icelandic</lang>
                    <orth>eista</orth>
                  </form>
                  <form type="descendant">
                    <lang>Norwegian Nynorsk</lang>
                    <orth>eiste</orth>
                  </form>
                </form>
              </item>
            </list>
          </re>
        </entry>
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