English
kindlessly
From kind (“benevolent; affectionate; mild”) + -less + -ly.
Formed from kind ‘benevolent’ + -less + -ly
Proto-Indo-European *ǵenh₁- ‘to produce’
…
Proto-Germanic *kinþiz ‘kind’
Proto-West Germanic *kundi
Old English cynd ‘inherent nature’
Middle English kynde
English kind
The story
Attested from the 19th century.
Today it means
adv Heartlessly, without kindness.
Language periods are conventional ranges, not dates for this word.
Etymograph / kindlessly