ripen/'raɪpən/

v. (make sth) become ripe

v. [I; T] （使）成熟：The peaches were ripening on the trees. 枝头上的梨正在成熟。

◇The sun ripens the corn. 太阳使谷物成熟。

构词ripe + -en

同缀 sharpen

音组-pen/-pən/

happen; open; ripen; sharpen