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：-ac

【来源及含义】Greek > Latin: suffix; from French -aque, or directly from Latin -acus, from Greek -akos forming adjectives. This suffix was used to form names of arts and sciences in Greek and it is now generally used to form new names of sciences in English; meanings, "related to, of the nature of, pertaining to, referring to"

【相关描述】The suffix -ic has related elements.

【同源单词】ambrosiac, ammoniac, amnesiac, anaphrodisiac, anthomaniac, antidemoniac

词根词缀：ana-, an-, ano-, am-

【来源及含义】Greek: up, upward; back, backward, against; again, anew; used as a prefix

【同源单词】ana-, Anabaptism, Anabaptist, anabaptize, anabatic wind, anabiont