frost/frɒst $ frɑːst/

n. a thin white layer of ice, which forms on surfaces outside when the air becomes very cold

n. [U] 霜：The trees are covered with frost. 树上结满了霜。

◇Frost formed on the window. 窗户上结了霜。

构词与freeze有关

音组-ost/-ɒst $ -ɑːst/

cost; frost; lost