-арка

From -ар (-ar) + -ка (-ka). Compare Polish -arka.

-арка • (-arka) f inan (variant -ярка)

1. forms feminine nouns referring to devices and machines, broadly construed; -ery, -er

   Synonym: -ачка (-ačka)

   ‎косити (kosyty) + ‎-арка (-arka) → ‎косарка (kosarka)

• This suffix does not form the feminine equivalents of masculine agent nouns ending in -ар (-ar) (see category). Such nouns are formed by the addition of -ка (-ka, feminine-equivalent suffix) to the masculine noun in question.