To metaphorically surrender, yield control or possession.
To give up, abandon or retire from something. To trade away.
To let go (free, away), physically release.
To accept to give up, withdraw etc.
To keep in possession or use.
To employ by paying a retainer.
To hold back (a pupil) instead of allowing them to advance to the next class or year.
To keep in one's pay or service.
To hold secure.