Accompany

verb

1. To go with or attend as a companion or associate; to keep company with; to go along with.

   "Geoffrey accompanied the group on their pilgrimage."

2. To supplement with; add to.
3. To perform an accompanying part or parts in a composition.
4. To perform an accompanying part next to (another instrument or musician).

   "I will accompany her on the oboe."

5. To associate in a company; to keep company.