covernoun
The suspect escaped under cover of a thick blanket of mist.
They will work under cover of night and return at daybreak to this border post.
The burglar broke into the house under cover of darkness.窃贼在夜幕掩护下闯进那所房子。
Under cover of the cannonade, the government divisions advanced and attacked the communist troops.

SMART Vocabulary: related words and phrases

Defending and protecting
air defence
anti-bug
anti-mosquito
baby
bandobast
cocoon
defensive
duck
duck and coveridiom
embedded
featherbedding
fight back
hedge
insulate
poisonous
security camera
security light
self-protective
self-protectiveness
shelter