IPA: /ˈfeɪd.ləs/
KK: /ˈfeɪd.ləs/
Not losing color or brightness over time; remaining vibrant and unchanged.
The fadeless flowers in the garden looked as beautiful as they did on the first day.
Fadeless → It is formed from "fade" (from Old English *fadian*, meaning to lose brightness or color) and "-less" (meaning without). The word "fadeless" means without fading or losing brightness.
Think of something that does not 'lose brightness' ('fade') and is 'without' ('-less') fading — that's what fadeless means.