词根词缀：-ics, -tics [-ac after i]

【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

词根词缀：orches-

【来源及含义】Greek: dance, pertaining to dancing

【同源单词】orchesograph, orchesography, orchestic, orchestics, orchestra, orchestral