monstrous
US /ˈmɑːn.strəs/
UK /ˈmɑːn.strəs/
1.
having the frightening or ugly appearance of a monster
:
•
The child had a nightmare about a monstrous creature.
•
The ancient tree had monstrous roots that spread far and wide.
2.
outrageously or unnaturally evil or wrong
:
•
It was a monstrous act of cruelty.
•
The company was accused of monstrous negligence.