1. [ adjective ] threatening or foreshadowing evil or tragic developments
Synonyms: ominous sinister threatening menacing ugly minatory minacious baleful

"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
2. [ adjective ] harshly uninviting or formidable in manner or appearance
Synonyms: grim dour

"a dour, self-sacrificing life" "a forbidding scowl" "a grim man loving duty more than humanity" "undoubtedly the grimmest part of him was his iron claw"- J.M.Barrie

Related terms: unpleasant
3. [ noun ] an official prohibition or edict against something
Synonyms: banning forbiddance ban
Related terms: prohibition test_ban forbid ban
Similar spelling:   forbiddingly