gar·nish / ˈgärnish/ • v. [tr.] 1. decorate or embellish (something, esp. food): salad garnished with an orange slice. 2. Law serve with a garnishment. ∎ seize (money, esp. part of a person's salary) to settle a debt or claim: the IRS garnished his earnings. • n. a decoration or embellishment for something, esp. food.
A. furnish, fit out, embellish XIV (now obs. or rhet., exc. for embellishing a dish of food XVIII);
B. (leg.) warn, as with a notice XVI. — (O)F. garniss-, lengthened stem (see -ISH2) of g(u)arnir :- Gmc. *warnjan, prob. rel. to warnējan, *-ōjan become aware, (hence) guard, defend, provide for (see WARN).
Hence garnishee (leg.) XVII. So garniture furniture, outfit XVI; ornament XVII; (of a dish) XVIII.