The origin of the word "trouble"

Ma's explanation is rather confusing. The explanation of trouble bothers you. The trouble here is not trouble. It is troublesome to form compound words. Please interpret 1. Trouble; Trivial. 2. annoying; Excuse me. 3. accidents, problems.

There's a joke

Once upon a time, there were three brothers. The boss is called a rogue, the second is called a kitchen knife, and the third is called trouble. One day, the trouble disappeared, and the eldest brother took the second brother out to look for it, but he couldn't find it.

Found in the middle of the night, the boss was in a hurry, took the second child and rushed to the police station, shouting, "I'm a hooligan with a kitchen knife, and I'm looking for trouble."