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：pyreto-, -pyrexia, -pyrexias, pyrito-

【来源及含义】Greek: fever, feverish, burning heat, hot

【相关描述】Closely related to the pyro- unit meaning fire, burn.

【相关词根词缀】 Related "heat, hot" word units: ferv-; thermo-. Cross references of word groups that are related, directly, indirectly, or partly to: "fire, burn, glow, or ashes": ars-, ard-; -bust; cand-, cend-; caust-, caut-; crema-; ciner-; ether-; flagr-; flam-; focus, foci-; fulg-; gehenna-; ign-; phleg-; phlog-; pyr-; spod- (ashes; waste); volcan-.

【同源单词】alexipyretic, antipyresis, antipyretic, apyretic, apyrexia, apyrexial