词根词缀：curr-, cur-, cor-, cour-

【来源及含义】Latin: to run, running

【同源单词】coarse, concoarse, concourse, concur, concurrence, concurrent

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