na-adjective
threatening; menacing
Describes an attitude, action, or atmosphere that is intended to intimidate or convey a threat. Often used in formal or written contexts.
彼の威嚇的な態度に、周りの人は怖がっていた。
People around him were frightened by his threatening attitude.
その国は隣国に対して威嚇的な軍事
That country conducted menacing military exercises against its neighbor.