best man 
noun
A male friend or relative chosen by a bridegroom to assist him at his wedding.My best man at my wedding was my brother, but my other attendants were two groomsmaids....
- One evening as I awaited trial, my brother asked me to be the best man at his wedding.
- They had been close and Harold had been his best man at his wedding in 1942, a year after joining the RAF.
- en primeur
- enprint
- en prise
- enqueue
- enquire
- enquirer
- enquiring
- enquiringly
- enquiry
- enquiry agent
- mutual
- mutual admiration society
- mutual aid
- mutual assured destruction
- mutual characteristic
- mutual conductance
- mutual deterrence
- mutual exclusion
- mutual fund
- mutual improvement
- mutual inductance
- mutual induction
- mutual instruction
- mutual insurance
- mutualisation