(adv.) In an inverse order or manner; by inversion; -- opposed to directly.

a rebours against the grain arsy-varsy backwards bottom side up bottom up by contraries contra contrarily contrariously contrariwise conversely head over heels heels over head in flat opposition just the opposite nay rather on the contrary oppositely otherwise over per contra quite the contrary rather to the contrary topsy-turvy tout au contraire turned around upside down vice versa