English
hatless
From hat + -less.
A compound of hat + -less
Proto-Germanic *hattuz ‘hat’
Proto-West Germanic *hattu ‘hat’
Old English hætt
Middle English hat ‘a hat or cap’
English hat
Today it means
adj Not possessing, or not wearing, a hat.
Language periods are conventional ranges, not dates for this word.
Etymograph / hatless