To relate or belong to; to have reference to or connection with; to affect the interest of; to be of importance to.

To engage by feeling or sentiment; to interest.

“A good prince concerns himself in the happiness of his subjects.”

To make somebody worried.

“I’m concerned that she’s becoming an alcoholic.”

Showing concern.

“There was a concerned expression on her face as I told her the news.”

Involved or responsible.

“The people concerned have been punished.”