nasal infix

noun1

1. •
   The Proto-Indo-European infix *-n(é)- used in imperfective verbs.

   • This type was formed by the ablauting affix *-né-/*-n- inserted before the last consonant of the root. […] Thus, to the root *leykʷ- 'leave', the stem forms are *li-né-kʷ-, atonic *li-n-kʷ-. — 1995