forbidding
1. [ adjective ] threatening or foreshadowing evil or tragic developments
Synonyms: ominous sinister threatening menacing ugly minatory minacious baleful
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
2. [ adjective ] harshly uninviting or formidable in manner or appearance
Synonyms: grim dour
Examples:

"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
  forbidden
  forbiddance
  foreboding