词根词缀:-less
【来源及含义】Old English: -leas, from leas, "free from, devoid of, false, feigned"; suffix meaning "lacking"
【同源单词】aimless, artless, avoidless, causeless, ceaseless, charmless
词根词缀:merci-
【来源及含义】Latin: merx, wares, merchandise
【同源单词】amerce, amerceable, commerce, commercial, commercialism, commercialization