IPA: /ˈkruːləs/
KK: /ˈkruːləs/
Not having a group of people to operate or manage something, especially a vehicle or vessel.
The crewless drone flew autonomously over the landscape.
Crewless → It is formed from "crew" (from Old French *creue*, meaning a group of people working together) and "-less" (meaning without). The word "crewless" means without a crew or group of people working together.
Think of being 'without' ('-less') a 'group of people working together' ('crew'). This helps you remember that 'crewless' means lacking a crew.