MINATORY

baleful, forbidding, menacing, minacious, minatory, ominous, sinister, threatening

(adjective) threatening or foreshadowing evil or tragic developments; “a baleful look”; “forbidding thunderclouds”; “his tone became menacing”; “ominous rumblings of discontent”; “sinister storm clouds”; “a sinister smile”; “his threatening behavior”; “ugly black clouds”; “the situation became ugly”

Source: WordNet® 3.1

Etymology

Adjective

minatory (comparative more minatory, superlative most minatory)

Threatening, menacing.

Synonyms

• minacious, ominous, sinister

Source: Wiktionary

Min"a*to*ry, a. Etym: [L. minatorius, fr. minari to threaten. See Menace.]

Definition: Threatening; menacing. Bacon.

Source: Webster’s Unabridged Dictionary 1913 Edition