retainer >> rɪˈteɪnə
Definition: [noun] a thing that holds something in place.
Example: a guitar string retainer
Definition: [noun] a fee paid in advance to someone, especially a barrister, in order to secure their services for use when required.
Example: he's on a retainer as a consultant
Definition: [noun] a servant, especially one who has worked for a person or family for a long time.
Example: faithful family retainers