词根词缀：cern-, cert-, cer-; cret-, creet-, cre-

【来源及含义】Latin: to separate, to sift, to distinguish, to understand, to decide, to determine; separated, separation, to set apart; the glandular extraction or the movement out of a natural substance

【相关描述】Used to express the ability a person has to distinguish, or to perceive, something with the eyes and the mind. Related to crit-; as in criticize, diacritical, critique, etc.

【同源单词】ascertain, ascertainable, ascertainment, certain, certainly, certainty

词根词缀：dis-, di-, dif-

【来源及含义】Latin: separation, apart, asunder; removal, away, from; negation, deprivation, undoing, reversal, utterly, completely; in different directions

【相关描述】The meaning of dis- varies with different words; dif-, assimilated form of dis- before f; di-, form of dis- before b, d, g, l, m, n, r, and v.

【同源单词】diffect, differ, difference, different, differentia, differential

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