baleful
1. [ adjective ] deadly or sinister
Synonyms: baneful
Examples:

"the Florida eagles have a fierce baleful look"

Related terms: maleficent
2. [ adjective ] threatening or foreshadowing evil or tragic developments
Synonyms: ominous sinister threatening menacing ugly minatory minacious forbidding
Examples:

"a baleful look" "forbidding thunderclouds" "his tone became menacing" "ominous rumblings of discontent" "sinister storm clouds" "a sinister smile" "his threatening behavior"

Related terms: alarming
Similar spelling:   balefully
  ball_field
  bailable