menacing
adj. B2 Upper Intermediate US //ˈmɛnəsɪŋ// UK //mˈɛnɪsɪŋ// men·ac·ing
adj. suggesting that something bad or dangerous is going to happen. You use this to describe a person, look, or sound that makes you feel unsafe.
adj. suggesting the presence of danger; threatening or portending evil. Often used to describe physical presence, facial expressions, or atmospheric conditions.
The dark clouds look menacing in the distance.
The stranger gave him a menacing look that made him want to leave the room immediately.
The soundtrack shifted from a light melody to a low, menacing drone, signaling to the audience that the protagonist was no longer alone in the forest.
Usage
Typically used attributively before a noun or predicatively after a linking verb like 'look' or 'sound'.