mon ‧ strous /ˈmɒnstrəs $ ˈmɑːn-/ BrE AmE adjective
1 . very wrong, immoral, or unfair:
It’s monstrous to charge that much for a hotel room.
Such monstrous injustice is hard to understand.
2 . unusually large:
a monstrous nose
3 . unnatural or ugly and frightening SYN hideous :
a monstrous shadow on the stairs
—monstrously adverb :
He was ugly and monstrously fat.
It was monstrously unfair.