If you describe a situation or event as monstrous, you mean that it is extremely shocking or unfair.
She endured the monstrous behaviour for years.
她忍受这种骇人听闻的行为多年。
If you describe an unpleasant thing as monstrous, you mean that it is extremely large in size or extent.
A group of men are erecting a monstrous copper edifice.
一群人正在建造一座又大又难看的铜制建筑。
If you describe something as monstrous, you mean that it is extremely frightening because it appears unnatural or ugly.
the film's monstrous fantasy figure.
电影中恐怖的魔幻形象。