Answer: monstrous

AnswerCrossword Clue
MONSTROUSHideous
MONSTROUSHumongous
MONSTROUSShocking.
MONSTROUSGigantic.
monstrous(of a person or an action) Inhumanly or outrageously evil or wrong
monstrousHaving the ugly or frightening appearance of a monster
monstrousExtremely and dauntingly large
monstroushuge, like a monster also MONSTRUOUS