IPA: /ˈtjuːbləs/
KK: /ˈtjuːbləs/
Describing a type of tire or system that does not use an inner tube to hold air.
Many modern bicycles are designed to be tubeless for better performance and fewer flats.
Tubeless → It is formed from "tube" (from Latin *tubus*, meaning a cylindrical container or pipe) and "-less" (meaning without). The word "tubeless" means without a tube, typically referring to tires that do not require an inner tube.
Think of a 'tube' as a cylindrical container and remember that 'tubeless' means something that is without a tube.