"Two apples are enough."
Translation:İki elma yeterli.
"yeter" = suffices. It's a verb. "-li" makes it an adjective. The opposite suffix would be "-siz" (without): Yetersiz = insufficient. But this is an isolated case; please don't start appending-li/-siz to other verbs so as to create adjectives. :-] Just learn this one as a separate word.