Serve

(sports) a stroke that puts the ball in play

serve a purpose, role, or function

do duty or hold offices

contribute or conduce to

be used by

help to some food

provide (usually but not necessarily food)

devote (part of) one's life or efforts to, as of countries, institutions, or ideas

promote, benefit, or be useful or beneficial to

spend time in prison or in a labor camp

work for or be a servant to

deliver a warrant or summons to someone

be sufficient

do military service

mate with

put the ball into play