RETIRING

To stop working on a permanent basis, usually because of old age or illness.

"Having made a large fortune, he retired."

(sometimes reflexive) To withdraw; to take away.

To cease use or production of something.

"The steamship made thousands of trips over several decades before it was retired by the shipping company."

To fit (a vehicle) with new tires.

Retirement

Introverted, liking privacy and seclusion.

"I don't really know him well, since he's so shy and retiring."