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：praxis-, -praxsis, -praxia, -praxic, -praxi-

【来源及含义】Greek > Latin: to do, to exercise, doing; action, activity, practice; the opposite of theory; from the stem of prassein, "to do, to act"

【同源单词】actinopraxis, agnostic apraxia, akinetic apraxia, amnesic apraxia, aphagopraxia, apraxia