Other forms: disdained, disdains, disdaining
Disdain is cool, superior dislike. Not anger — looking at something as though it were beneath you.
The coldness is what defines it, and that is what separates disdain from contempt, which burns hotter, and from dislike, which claims no superiority at all. It usually appears with for or with: disdain for the whole business, dismissed with disdain. There is a verb too, and to disdain something is to refuse it as beneath you, as in he disdained to reply. The adjective disdainful describes a look more often than a person.
Old French
desdeignier
Middle English
disdeynen
English, today
disdain
From Middle English disdeynen, from Old French desdeignier (modern French dédaigner).
Etymology from Wiktionary, CC BY-SA