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：bas-, baso-, basi-, ba-, bat-
【来源及含义】Greek > Latin: stepping, to step, to go, to walk; a place where someone steps; a pedestal; a foot for stepping; foundation, ground, base