BALEFUL
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”
baleful, baneful
(adjective) deadly or sinister; “the Florida eagles have a fierce baleful look”
Source: WordNet® 3.1
Etymology
Adjective
baleful (comparative more baleful, superlative most baleful)
Portending evil; ominous.
Miserable, wretched, distressed, suffering.
Source: Wiktionary
Bale"ful, a. Etym: [AS. bealoful. See Bale misery.]
1. Full of deadly or pernicious influence; destructive. "Baleful
enemies." Shak.
Four infernal rivers that disgorge Into the burning lake their
baleful streams. Milton.
2. Full of grief or sorrow; woeful; sad. [Archaic]
Source: Webster’s Unabridged Dictionary 1913 Edition