*anduraz

Probably from Proto-Indo-European *h₁nedʰ-, through a heteroclitic *-wer/n- formation *h₁n̥dʰ-wer/n- associated with going and travel; Proto-Germanic *anduraz reflects a thematicized secondary full-grade formation *h₁ondʰ-ur-o-s. (Kölligan 2025: 8,32; Kroonen 2013: 27; Martirosyan 2010: 91; Rix 1970: 107 n. 71; Rix et al. 2001: 249). The root is directly reflected in Doric and Arcadian Greek ἐνθεῖν (entheîn) and Homeric ἐνήνοθε (enḗnothe); ἐνθεῖν (entheîn) is not a dialectal development of ἐλθεῖν (eltheîn), although later forms may have been influenced by association with it (Kölligan 2025: 2–6; Rix et al. 2001: 249). Closely related nominal formations include Sanskrit अध्वन् (ádhvan) < *h₁n̥dʰ-wen- and Sanskrit अध्वर (adhvará-) < *h₁n̥dʰ-wer-, the latter probably reflecting an older sense ‘(holy) way, procedure’; compare also Younger Avestan 𐬀𐬛𐬠𐬀𐬥 (adban) (Kölligan 2025: 8; Mayrhofer 1992: I.68). The direct Germanic continuation is Old Norse ǫndurr, while Proto-Finnic *antura was borrowed from the Germanic word (Kroonen 2013: 27).