IPA: //ˈstrɪp.ləs//
KK: /ˈstrɪp.ləs/
Not having any stripes or lines on the surface.
The stripeless design of the dress made it look very elegant.
Stripeless → It is formed from "stripe" (from Old French *estripe*, meaning a line or band) and "-less" (meaning without). The word "stripeless" means without stripes or lines.
Think of something that is 'without' ('-less') 'stripes' — that's why stripeless means lacking stripes.