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