词根词缀：etho-, eth-, ethi-

【来源及含义】Greek: custom, habit; character, manners; usage

【同源单词】caco, ethic, ethical, ethicality, ethicize, ethics

词根词缀：-ics

【来源及含义】Greek: a suffix that forms nouns and is usually used to form names of arts and sciences

【同源单词】acoustics, acoustoelectronics, acousto-optic, actinogenics, actinotherapeutics, actinotherapy