What?
I thought it was etymology. Windless comes from the Old English and Middle English (as well as Dutch and German "wind" , closely related to the Icelandic "vindr", and the Goth "vinds", which means "wind". Less comes to us again from the Old and Middle English "læs(sa)", with ties to the Old Frisian "lës(sa)", meaning "less". Don't let anyone ever tell you spelling (and etymology) aren't important! This is according to the 1966 Unabridged Random House Dictionary,,of the English Language. Good thing to have around the house, but not as useful on the boat .