IPA: /ˈtuːləs/
KK: /ˈtuːləs/
Not needing any tools for assembly or use.
The toolless design of the furniture made it easy to set up without any extra equipment.
Toolless → It is formed from "tool" (from Old English *tōl*, meaning an instrument or implement) and "-less" (meaning without). The word "toolless" means without tools or not requiring tools for use.
Think of being 'without' ('-less') any 'instruments' ('tool') — that's what toolless means.