IPA: /ˈtreɪlˌbreɪkər/
KK: /ˈtreɪlˌbreɪkər/
A person who is the first to do something or who leads the way for others to follow.
As a trailbreaker in the tech industry, she introduced innovative ideas that changed the market.
Trailbreaker → It is formed from "trail" (from Old French *traille*, meaning a path or track) and "breaker" (from Old English *brecan*, meaning to break). The word "trailbreaker" refers to someone who breaks a new path or creates a new trail.
Think of someone creating a new "path" ('trail') and "breaking" through obstacles ('breaker') — that's what a trailbreaker does.