"Achater" is a verb in French that means "to buy" and does not have a gender. However, if you are referring to the noun "un achat," which means "a purchase," it is masculine. In French, nouns have genders, but verbs do not.
Actrice is feminin;the masculin version is acteur
faux is masculin. feminin of faux is fausse.
masculin
masculin
masculin
masculin
its masculine
feminine
its feminine
feminine
feminin
feminine