купа•ш (-ем)
{verb II} [Generate paradigm] 1. to grow moldy (A.E.), to grow mouldy (B.E.)
♢ ложа•ш купе•н {sentence} the flour grew moldy
2. to be covered by algae, to be covered with pond scum
♢ ши•нчыше ер купе•н {sentence} the stagnant lake became covered with algae