词根词缀：grat-, gra-, grac-

【来源及含义】Latin: beloved, pleasing, dear, agreeable; grateful, thankful, pleased

【同源单词】agree, agreeable, agreeableness, agreeably, agreement, congratulate

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