IPA: /ˈtʃaɪldləs/
KK: /ˈtʃaɪldləs/
Not having any children.
They decided to live a childless life, focusing on their careers instead.
Childless → It is formed from "child" (from Old English "cild", meaning a young human being) and "-less" (meaning without). The word "childless" means without children or lacking offspring.
Think of someone who is 'without' ('-less') a 'child' — that's why childless means not having children.