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：geo-, ge-

【来源及含义】Greek: earth, land, soil; world; Gaia (Greek), Gaea (Latin), "earth goddess"

【相关词根词缀】Available for further enlightenment: the Earth, Words from the Myths.
Cross references of word families related directly, or indirectly, to: "land, ground, fields, soil, dirt, mud, clay, earth (world)": agra-; agrest-; agri-; agro-; argill-; choro-; chthon-; epeiro-; glob-; lut-; myso-; pedo-; pel-; rhyp-; soil-; sord-; terr-.

【同源单词】ageotropic, ageotropism, agrogeological, agrogeologist, agrogeology, amphigean

词根词缀：-ism, -ismus

【来源及含义】Greek, ismos; Latin, ismus: a suffix: belief in, practice of, condition of, process, characteristic behavior or manner, abnormal state, distinctive feature or trait

【同源单词】abaptism, abolitionism, abortionism, abrakophilism, absenteeism, absolutism

词根词缀：tropo-, trop-, -tropal, -trope(s), -tropic, -tropism, -tropia, -tropous, -tropy, trep-

【来源及含义】Greek: bend, curve, turn, a turning; response to stimulus

【相关描述】Don't confuse this tropo-, -tropy element with tropho-, meaning "food, nourishment, nutrition".

【相关词根词缀】 Inter-related cross references involving word units meaning "bend, curve, turn": diversi-; diverticul-; flect-, flex-; gyro-; meand-; -plex; streph-; stroph-; tors-; verg-; vers-; volv-.

【同源单词】acrotropic, acrotropism, aerotropic, aerotropism, ageotropism, allotrope