admonitory

/ədˈmɑnəˌtɔri/

adjective

Giving or conveying a warning or reprimand.

the sergeant lifted an admonitory finger

menacing,intimidating,bullying,frightening,terrifying,scary,fearsome,mean-looking,alarming,forbidding,baleful

SYNONYMS

alarmingbalefulbullyingfearsomeforbiddingfrighteningintimidatingmean-lookingmenacingscaryterrifying