IPA: /ˈskaʊtˌmæstər/
KK: /ˈskaʊtˌmæs.tɚ/
An adult who leads and organizes a group of Boy Scouts, guiding them in activities and teaching them skills.
The scoutmaster planned a camping trip for the troop this weekend.
Scoutmaster → It is formed from "scout" (from Old French *escouter*, meaning to listen or to observe) and "master" (from Old English *maegester*, meaning one who has control or authority). A scoutmaster is someone who has authority over scouts, guiding and overseeing their activities.
Think of someone who 'listens' or 'observes' ('scout') and has 'authority' ('master') over a group — that's what a scoutmaster does.