词根词缀：a-, an-

【来源及含义】Greek: prefix; no, absence of, without, lack of; not

【相关描述】These prefixes are normally used with elements of Greek origin, a- is used before consonants and an- is used before vowels.

It affects the meanings of hundreds of words.

There are too many words that use these prefix elements to list all of them on this site; however, there are significant examples listed in this and the other units where they exist.

【同源单词】abacterial, abaptism, abarognosis, abasia, abiocoen, abiogenesis

词根词缀：-ic

【来源及含义】Greek: a suffix; pertaining to; of the nature of, like; in chemistry, it denotes a higher valence of the element than is expressed by -ous

【同源单词】abdominocystic, abdominopelvic, abdominoscopy, abdominothoracic, abiogenetic, abiogenic

词根词缀：tono-, ton-, -tonia, -tonic, -tonous, -tony (sound)

【来源及含义】Greek > Latin: sound, tone; [Greek tonos, "that which is stretched, a stretching, a straining, a pitch of the voice, a musical note"]

【同源单词】aerotonometer, aerotonometry, atonal, atonic, barytone, detonate

词根词缀：tono-, -tonia, -tone, -tony, -tonic, -tonical (tension)

【来源及含义】Greek: tonos = tension, pressure

【相关描述】The element tono- is a combining form with the meanings "stretching", "tension", "tone", used in the formation of compound words.

The suffix element -tonia is a combining form with the meanings of "muscle tension" or "nerve tension"; as specified by the initial element: hypertonia; used also in the formation of words that denote more generally a personality type or personality disorder; for example, catatonia and somatotonia.

【同源单词】amyotonia, amyotonic, angiohypertonia, angiohypotonia, atonia, atonic