词根词缀：chemo-, chem-, chemico-, chemi-, -chemist, -chemic, -chemical

【来源及含义】Arabic > Greek > Latin: the art of combining base metals [to make gold]; from Greek, chemia, “Egypt”, supposedly where the art of changing metals into gold existed

【同源单词】agrichemistry, agrochemical, alchemist, alchemy, allelochemics, allochemic

词根词缀：nastic, -nastic; nasty, -nasty; -nastism

【来源及含义】Greek: nastos, pressed close, crammed full; firm, solid

【同源单词】aitionastic, apinastic, autonastic, chemonasty, econastic, epinasty