withdraw into oneself

As each day passed, he seemed to withdraw more into himself.

He wouldn't even let the boy's mother see him, Peter withdrew into his books and television.

He withdrew into the room and went over to the windows.

He withdrew back into the room and closed the window.

He withdrew and with an effort forced his way into the other.

His voice was well on the way to withdrawing into itself.

She had withdrawn into some secret world of her own.

As we walk on, she seems to withdraw into her own thoughts.

She withdrew back into the baby's room and closed the door, leaving the two men together.

Then he withdrew into himself, and I stopped the young men from speaking to him again.