禁じる
きんじる · kinjiru · JLPT N1 · verb-ichidan
to prohibit
🌲 禁 = 示 altar + 林 forest: an off-limits sacred grove, hence to prohibit
The noun 禁 (ban) takes the verb ending じる to become 禁じる. Its original sense was a sacred grove fenced off, where entry was barred.