To keep in one's pay or service.
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 possession or use.
To hold secure.
To send or convey something from one person, place or thing to another.
To spread or pass on something such as a disease or a signal.
To communicate news or information.
To convey energy or force through a mechanism or medium.
To impart, convey or hand down something by inheritance or heredity.
To send out a signal (as opposed to receive).