to put a biscuit, piece of bread, etc. into a liquid such as tea, coffee, or soup for a short time before eating it

She dunked a biscuit in her coffee. 她把饼干在咖啡里蘸了一下。

to put something into liquid for a short time

Dunk the sponge in water every once in a while to stop it from drying out. 时常把海绵浸在水里可避免它变干。

to slam-dunk