(n.) One who descends.

a priori a rebours a reculons abandon abet accented acknowledgments advance advocate affirm afford support aft after aftermost afterpart afterpiece again against the grain ago aid alpenstock alveolar alveolar ridge alveolus angel ante ante up anticlockwise apex apical apico-alveolar apico-dental arear arena arm around arrested articulated arytenoid cartilages ascend ascender ascending aside ass-backwards assimilated assist assure astern athletic supporter attest authenticate away axial back away back door back matter back of beyond back off back seat back side back up back when back-country back-flowing backbone backdrop background backing backpedal backside backstop backtrack backtrail backward backwards backwater backwood backwoods backwoodsy bandeau bankroll bankrupt barytone bastard title bastard type be sponsor for bear bear out bear up beard bearer behind behindhand belated belly bestraddle bestride bet bet on bevel bibliography bilabial black letter blade blocked board body bolster bolster up bond boost bra brace bracer bracket brassiere break breech broad budge buoy up buttress by cacuminal call cane cap capital capitalize carrier carry case cast off catch line catchword central cerebral certify cervix champion change change place chasing checked circle circumstantiate climb climb on close colophon come after come last commend confirm consonant consonantal contents contents page continuant copyright page corroborate corset counter counterclockwise countermarch countersecure cover cradle crook crush crutch cry up cushion deceitfully dedication defeat delayed delayed-action dental deny descend descender descending destroy detained disavow disown disregard dissimilated distance distant document dorsal dorsal region dorsum down-trending downward drifting due early ebb elect em en encourage endleaf endorse endpaper endsheet ensure errata ex post facto extremity face fade fail fall astern fall back fall behind fat-faced type feet field finance flat flow flowing fluent flying flyleaf folio follow following font for a consideration fore edge foreword forsake fortify foundation garment fro front front matter frontier fulcrum fund furtively gamble get behind get in get in behind get on get over girdle give support