词根词缀：civi-, civ-, cit-

【来源及含义】Latin: city: big town, metropolitan area; citizen: a legal resident or inhabitant

【同源单词】citadel, citizen, citizenry, city, civic, civically

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