前缀：il-, in-, ir-, im-

【词根含义】：不,无,非;入,向内

【词根来源】：(il-用于l前;im-用于b, m, p前;ir-用于r前;in-用于其它情况)   来源于拉丁语in。

【同源单词】：illegal, illegality, illegitimate, illiterate, illogical

词根词缀：-ment

【来源及含义】Latin: a suffix; result of, means of, act of; place of action

【相关描述】The suffix -meant is a final word element derived through Middle English and French from the Latin suffix -ment(um), originally used to form agent and action nouns from verbs, now used to form nouns and denominative verbs in several related senses:

The verb combinations show no change in basic form: cement, compliment, lament.

Principal parts: -menting, -mented, -mented.

Related forms: -mentum (singular); -menta, -menti, -ments (plurals).

【同源单词】abolishment, abridgment, accompaniment, accomplishment, accouterment, achievement

词根词缀：prob-, proba-, probat-, prov-

【来源及含义】Latin: upright, good, honest; to try, to test, to examine; to demonstrate

【同源单词】Aliudque cupido, approbate, approbation, approbative, approbativeness, approvable