best man

principal attendant of the bridegroom at a wedding

The best man is the name given to the chief male assistant to the bridegroom at a wedding. Usually the groom extends this honor to someone who is close to him, generally either a brother or his closest male friend. Alternatively, should one of the groom's male friends have been directly responsible for introducing the groom to his bride (or otherwise responsible for bringing them together), the honor of best man might be extended to him in gratitude. In a remarriage, a son of the groom may sometimes act as best man.
See more at Wikipedia.org...

Noun
1. the principal groomsman at a wedding
(hypernym) groomsman
(member-holonym) wedding, wedding party

n.
شہ بالا , شہوالا , شوالا

Synonyms and related words:
acolyte, adjutant, agent, aid, aide, aide-de-camp, aider, assistant, attendant, auxiliary, bridemaiden, bridesmaid, bridesman, coadjutant, coadjutor, coadjutress, coadjutrix, deputy, executive officer, groomsman, help, helper, helpmate, helpmeet, lieutenant, matron of honor, paranymph, paraprofessional, second, servant, sideman, supporting actor, supporting instrumentalist, usher, wedding attendant, wedding party,