mend

Concise Oxford English Dictionary © 2008 Oxford University Press:
mend/mend/

▶verb

• 1 restore to a sound condition.

  ■ return to health.

• 2 improve: mend your ways.

• 3 add fuel to (a fire).

▶noun a repair in a material.

– phrases
mend (one's) fences make peace with someone.
on the mend improving in health or condition.

– derivatives
mendable adjective,
mender noun.

– origin ME: shortening of amend.