sinister
adj.adj. giving the impression that something evil or harmful is going to happen. You use this to describe things that feel threatening or creepy.
adj. suggesting or conveying an impression of evil, harm, or trouble. Often used to describe atmosphere, appearance, or intent.
The old house looked sinister in the moonlight.
A sinister figure was seen lurking in the shadows near the bank's side entrance.
The film uses low lighting and a deep, pulsing soundtrack to create a sinister atmosphere that keeps the audience in a state of constant anxiety.
From Middle English sinistre (“unlucky”), from Old French senestre, sinistre (“left”), from Latin sinister (“left hand”).
Typically precedes the noun it modifies or follows a linking verb like 'look' or 'seem'.