词根词缀：fals-, fall-

【来源及含义】Latin: deception, untrue, incorrect; deceiving; contrary to truth and fact

【同源单词】default, default, defaulter, electrical fault, fail, failing

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