au-

See also: Appendix:Variations of "au"

Chuukese

Prefix

au-

1. first-person plural exclusive subject marker for tense modifying adverbs

Latin

Etymology

Usually derived from Proto-Indo-European *h₂ew, and as such would be unrelated to its allomorph ab-; au- possibly took the place of ab- before f- to avoid confusion with ad-. Presumably, *ad and *ab would have both become af- before f-, given how sub- and ob- yielded suf- and of- in the same environment.

This has not deterred Bréal, Vine, De Vaan, Cser and DeLisi from continuing to attempt to derive au- from ab-. They do not provide an explanation for how sub- and ob- did not partake in a similar development.

Prefix

au-

1. Alternative form of ab- used before f-

   ‎ab- + ‎ferō → ‎auferō

   ‎ab- + ‎fugiō → ‎aufugiō