купаш (-ем)
{глагол второго спряжения} [Generate paradigm] 1. to grow moldy (A.E.), to grow mouldy (B.E.)
♢ ложаш купен {предложение} the flour grew moldy
2. to be covered by algae, to be covered with pond scum
♢ шинчыше ер купен {предложение} the stagnant lake became covered with algae