to serve (to help in a shop; to bring a meal to someone) / to be used for / to be useful for someone, to be of use, come in handy / to serve (start a point with service) / to set up (pass to, in order to give a scoring chance) / to help oneself, to serve oneself / to use, make use of

(formal) At your service. (literally "to serve you")

first-person singular future of servir

third-person plural past historic of servir