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：in-1

【来源及含义】Latin: no, not [ig-, il-, im-, ir-]

【相关描述】This in-, "not", becomes i- before gn, as with "ignore"; il- before l, as with illiterate; im- before b, m; and p, as with imbalance, immiscible, impecunious; and ir- before r, as with irrefragable.

Don't confuse this Latin prefix, in-¹, meaning "not", with another Latin prefix in-² meaning "in, into, within, inside, on, toward" or with the prefix for English-origin words in-³ meaning "in, into; within".

【同源单词】ignorance, illiterate, imbalance, immaculate, immature, immovable

词根词缀：pon-, posit-, pos-, -poning, -poned, -ponency, -ponent, -ponement, -pound

【来源及含义】Latin: to place, to put, to set; placement, positioning

【相关词根词缀】 Related word families intertwined with "to place, placing, to put; to add; to stay; to attach" word units: fix-; prosth-; stato-; the-, thes-.

【同源单词】aeolian deposit, appose, apposite, appositely, appositeness, apposition

词根词缀：-tion

【来源及含义】Latin: a suffix forming nouns from verbs of condition and action; an act or process: resumption, absorption; state or condition, redemption, exhaustion; something resulting from or otherwise related to an act or process, assumption, friction

【相关描述】This unit is presenting a small fraction of the hundreds of words ending with the suffix of -tion; however, there is a significant number of words which may help everyone have a better understanding and appreciation of the use of this element.

【同源单词】abduction, abjection, ablution, ablution, abolition, abruption