an official prohibition or edict against something
Adjective:
harshly uninviting or formidable in manner or appearance;
"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"
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"