词根词缀：retro-, retr-

【来源及含义】Latin: back, backward, backwards; behind

【同源单词】arrear, regurgitant menstruation, retroact, retroaction, retroactive, retroactively

词根词缀：vers-, vert-, -verse, -version, -version, -versation, -versal, -versary, -vert, vort-, vors-

【来源及含义】Latin: bend, turn

【相关词根词缀】 Inter-related cross references involving word units meaning "bend, curve, turn": diversi-; diverticul-; flect-, flex-; gyro-; meand-; -plex; streph-; stroph-; tors-; tropo-; verg-; volv-.

【同源单词】ad, adversaria, adversary, adversative, adversative, adversatively