Ref
/ɹɛf/
noun
A referee.
A refrigerator.
verb
To referee; to act as a referee in a sport or game.
noun
A dining-hall, especially in an institution such as a college or monastery.
noun
A relationship or relation (to something).
A measurement one can compare to.
Information about a person, provided by someone (a referee) with whom they are well acquainted.