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：pass-, pati-

【来源及含义】Latin: suffering, feeling; enduring

【相关词根词缀】 Related-word units meaning feeling: aesth-; senso-; patho-.

【同源单词】compassion, compassionate, compassionately, compassionless, compassive, compassivity