Verb-stems in -αυ- for (αw, -αϜ-) .—Two verbs with verb-stems in -αυ have presents in -αιω from -αιϝω out of -αϝ-yω ( cross38 a) : καίω
a. Attic prose often has κά_ω and κλά_ω, derived from αιϝ before ει (κά_εις, and, with α_ extended to the 1 person, κά_ω). Cp. cross396.
Herbert Weir Smyth [n.d.], A Greek Grammar for Colleges; Machine readable text [info] [word count] [Smyth].