词根：-dur-

【词根含义】：坚固,持久

【词根来源】：来源于拉丁语动词duro, durare, duravi, duratus(坚固,持久)。

【同源单词】：dour, durability, durable, durance, duration

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：-ation, -ization, -isation

【来源及含义】Greek > Latin: a suffix; action, act, process, state, or condition; or result of doing something

【相关描述】Although there are over 1,450 word entries ending with -ation or -ization listed in this unit, there are certainly many more which exist in the English language. At any rate, this unit provides a significant number of -ation and -ization examples for you to see.

【同源单词】abarticulation, abbreviation, abdication, abdominal examination, aberration, abevacuation

词根词缀：duro-, dur-, dura-

【来源及含义】Latin: hard [as wood], lasting; thick, tough

【同源单词】dour, dourly, dourness, dura mater, durability, durable