mind

The ability for rational thought.

"Despite advancing age, his mind was still as sharp as ever."

The ability to be aware of things.

"There was no doubt in his mind that they would win."

The ability to remember things.

"My mind just went blank."

(originally and chiefly in negative or interrogative constructions) To dislike, to object to; to be bothered by.

"Do you mind if I smoke?"

To look after, to take care of, especially for a short period of time.

"Would you mind my bag for me?"

(chiefly in the imperative) To make sure, to take care (that).

"Mind you don't knock that glass over."