IPA: //ˈkɒn.sɚtˌmɑː.stər//
KK: /ˈkɒnsɚtˌmɑːstər/
The lead violinist in an orchestra who often plays solos and helps conduct the group.
The concertmaster led the orchestra through the challenging piece with great skill.
Concertmaster → It is formed from "concert" (from Italian *concerto*, meaning a musical performance) and "master" (from Old English *maegester*, meaning one who has control or authority). The word "concertmaster" refers to the lead violinist or principal player in an orchestra, who has authority over the ensemble during performances.
Think of a 'musical performance' ('concert') led by a 'master' or leader — that's why a concertmaster is the principal musician in charge.