1. Serve, an English word, is mainly used as a verb and noun. As a transitive verb, it means "to entertain, to supply; to serve for...; to be useful to...; to be used for...". It cannot be used as a verb. The object verb means "to serve, to serve; to be suitable, to be enough; to serve; to entertain, to serve"; as a noun, it means "to serve, it is the turn to serve; a person's name; (France) Self".
2. Bilingual example: Serve all and be nothing. Serve all and be nothing.