Wurdahuzdą: Proto-Germanic dictionary

numeral nine From earlier *newunt, from Proto-Indo-European *h₁néwn̥ (‘nine’), with -t added through influence of *tehun (‘ten’). Some descendants supposedly reconstruct a variant *negun instead. This presents an isolated case of wu undergoing dissimilatory fortition to gwu (creating the Pre-Germanic form *negwunt necessary for explaining this discrepancy). This change must've happened quite early on in history, as it underwent a regular application of Boukólos rule, showing the gwu losing the w before u, becoming gu (just like other labiovelars in this position) and also regular loss of word final unstressed Pre-Germanic t (which from the word-final consonant of the Proto-Indo-European ancestor term being d in most cases, but in this case was excresently added via influence from *tehun (‘ten’) as mentioned above).