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：limit-, lim-

【来源及含义】Latin: threshold (level at which something happens), point at which something begins or changes; boundary, limit

【同源单词】eliminate, elimination, illimitable, liminal, liminometer, liminoscope