IPA: //ˈsoʊpləs//
KK: /ˈsoʊpləs/
Not containing or using soap.
The soapless solution is gentle on the skin.
Soapless → It is formed from "soap" (from Old English *sape*, meaning a substance used for washing) and "-less" (meaning without). The word "soapless" means without soap or lacking soap.
Think of being 'without' ('-less') a substance used for washing ('soap'). This helps you remember that 'soapless' means lacking soap.