IPA: /ˈbeɪsləs/
KK: /ˈbeɪsləs/
Not supported by any facts or evidence; lacking a solid foundation.
The accusations against him were completely baseless and without merit.
Baseless → It is formed from "base" (from Old French *base*, meaning foundation or support) and "-less" (meaning without). The word "baseless" means without a foundation or support, indicating something that lacks a basis or justification.
Think of something that has no 'foundation' ('base') — that's why baseless means lacking a solid basis.