From Proto-Finnic *epä. Originally active present participle (-pä) of the negative verb stem *e-; see ei. Cognate with Estonian eba-, Livonian äb, Moksha аф (af), Erzya апак (apak).

• IPA^(key): /ˈepæ-/, [ˈe̞pæ-]

epä-

1. Used to invert the meaning of a word: in-, non-, un-, dis-, mis-, mal-

   ‎epä- + ‎selvä (“clear”) → ‎epäselvä (“unclear”)

• evätä

• “epä-”, in Kielitoimiston sanakirja [Dictionary of Contemporary Finnish]‎^[1] (in Finnish) (online dictionary, continuously updated), Kotimaisten kielten keskuksen verkkojulkaisuja 35, Helsinki: Kotimaisten kielten tutkimuskeskus (Institute for the Languages of Finland), 2004–, retrieved 2023-07-02

From Proto-Finnic *epä-. Cognates include Finnish epä- and Estonian eba-.

• (Ala-Laukaa) IPA^(key): /ˈepæ-/, [ˈe̞pæ-]
• (Soikkola) IPA^(key): /ˈepæ-/, [ˈe̞b̥æ-]

epä-

1. Used to invert the meaning of a word: un-, non-