to be of use or help in fulfilling or accomplishing something

do duty or hold offices; serve in a specific function

contribute or conduce to

be used by; as of a utility

help to some food; help with food or drink

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

promote, benefit, or be useful or beneficial to

to deliver a legal document, such as a summons or writ, to the intended recipient in a formal and official manner in accordance with legal procedures and requirements

to work for a particular cause or serve a specified organization for a period of time

to spend a period of time being locked up in prison

to engage in copulation, as a male breeding animal with a female, in order to produce offspring

do military service

(of an amount of food) to be sufficient enough for a particular number of people

***attend to (a customer in a shop).

***play (a trick) on (someone).

***treat (someone) in a specified way.

*** to provide an area or a group of people with a product or service

***to have a particular effect or result

***(MILITARY) operate (a gun).