verb

make or become dark or darker.

the sky was darkening rapidly

grow dark/darker,blacken,grow black/blacker,dim,grow dim,cloud over,lour,make dark/darker,make black/blacker,make dim,shade,eclipse,fog,obscure

verb

make or become dark or darker.

the sky was darkening rapidly

grow dark/darker,blacken,grow black/blacker,dim,grow dim,cloud over,lour,make dark/darker,make black/blacker,make dim,shade,eclipse,fog,obscure

verb

make or become dark or darker.

the sky was darkening rapidly

grow dark/darker,blacken,grow black/blacker,dim,grow dim,cloud over,lour,make dark/darker,make black/blacker,make dim,shade,eclipse,fog,obscure