thief under one’s own roof

thief Noun

— A thief is a person who steals.

under Preposition

— In the same place as another thing, but lower. They ate under the trees. — In the control of. He was under the leader of the organization. — In the middle of a process; experiencing. The idea is under the committee's judgement (judging).

own Adjective

— If something is your own it belongs to you or is about you (often used for emphasis). I wish I had my own home. I bought it in my own name. The toy began to move as though it had a life of its own. accidents happen, and often in your very own home. — If you are on your own, you are by yourself, there is no body else with you. This can also mean there is no one helping you. I was on my own in the woods. If you try to do that you're on your own - or at least I won't help you!

own Verb

— If you own something it belongs to you, it is yours. Yes, I own a car. I plan to build a house on the land I own. — If you "own up" to something, you admit you did it. I had to own up to lying about our relationship.

roof Noun

— A roof is the top part of a building. My five brothers, two sisters and seven cousins all live together under one roof.

roof Verb

— If you roof something, then you are putting a roof onto a building. My father had to roof our house because it needed a roof.