キン

禁, 林, 木, 示

prohibition, ban, forbid

禁止(きんし): prohibition; inhibition; ban
禁煙(きんえん): (1) abstaining from smoking; quitting smoking (2) No Smoking!; Smoking Prohibited!
禁じる(きんじる): to prohibit
禁物(きんもつ): taboo; forbidden thing
禁ずる(きんずる): to forbid; to suppress