dis·dain / disˈdān/ • n. the feeling that someone or something is unworthy of one's consideration or respect; contempt: her upper lip curled in disdain | an aristocratic disdain for manual labor.• v. [tr.] consider to be unworthy of one's consideration: gamblers disdain four-horse races. . ∎  refuse or reject (something) out of feelings of pride or superiority: she remained standing, pointedly disdaining his invitation to sit down | he disdained to discuss the matter further.

disdain sb. XIII (dedeyn). — OF. desdeign, AN. dedeign (mod. dédain), f. Rom. *disdignāre, for L. dēdignārī reject as unworthy; see DIS- 2, DEIGN.
So as vb. XIV.