Assist (verb)

1. To help or support someone or something in achieving a goal or task.
2. To give aid or support.
3. To be present at an event or activity in a supporting role.
4. To participate or cooperate in an action or endeavor.

Origin:

Late middle english: from old french assister, from latin assistere "be present at, stand near", from ad- "to" + sistere "take a stand".

Examples:

1. She assisted him with his homework.
2. The nurse assisted the doctor during the surgery.
3. He assisted the team in winning the game.
4. The teacher assisted the students with their projects.
5. The company assisted in the relief efforts.