It is better for monstrous beasts to haunt your dreams, than for monstrous people to haunt your life.

If you have an abusive partner, stop lying to yourself about it and kick them to the curb.

It won't get better, and you can do better.

Thinking of using monstrous in a story you're working on? Mark Twain used it nine times in Adventures of Huckleberry Finn: Jim was monstrous proud, a monstrous big lumber-raft, some monstrous hooks on it, a monstrous big river, a monstrous long raft, her monstrous bows, a monstrous easy time, a monstrous big river, a couple of monstrous big soldier-plumes. You would think he'd use huge, but it doesn't occur once.

Etymology: the words phantom and monster, i.e. visions of horror, are derived from words phanein in Greek and monstrare in Latin, both verbs that mean to see or to show.

If you're Catholic, you may remember that the gold and glass case for ceremonially displaying the communion wafer is called a monstrance, from the same root. 

When I first learned about monstrances as a teenager, the priest who was teaching us picked it up and marched around roaring like a monster to engrain the word in our heads