IPA: /ˈtrɛd.ləs/
KK: /ˈtrɛd.ləs/
Describing something that does not have treads, which are the raised parts on a surface that provide grip or traction.
The new tires are treadless, making them unsuitable for wet conditions.
Treadless → It is formed from "tread" (from Old English *tredan*, meaning to step or walk) and "-less" (meaning without). The word "treadless" means without the act of stepping or walking.
Think of 'tread' as stepping or walking, and remember that 'treadless' means without stepping.