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：ultra-, ult-

【来源及含义】Latin: beyond, on the other side; excessive, to an extreme degree

【相关词根词缀】 Related "above, over, beyond the normal, excessive" word units: epi-; hyper-; super-, supra-. Inter-related cross references, directly or indirectly, involving word units meaning "more, plentiful, fullness, excessive, over flowing": copi-; exuber-; hyper-; multi-; opulen-; ple-; pleio-; plethor-; poly-; super-; total-; undu-.

【同源单词】A primo ad ultimum, Ad finem ultimum, antepenultimate, bioultrasonics, cryoultramicrotomy, exultingly