词根：-fin-, -finit-

【词根含义】：结束,界限

【词根来源】：来源于拉丁语名词finis(结束)和动词finio, finire, finivi, finitus(结束,界限)。

【同源单词】：confine, define, definite, definitely, definition

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：fin-

【来源及含义】Latin: end, last; limit, boundary, border

【同源单词】Ad finem fidelis, Ad finem spero, Ad finem ultimum, ad finem, ad infinitum, affinity

词根词缀：-ity

【来源及含义】Latin: suffix used to form abstract nouns expressing act, state, quality, property, or condition corresponding to an adjective

【同源单词】abnormality, absorbability, acclivity, acerbity, acridity, acrity