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：in-3

【来源及含义】Old English, Middle English: in, into; within; toward; a prefix used in front of English words, not Latin or Greek elements; as in the words, indoors and inland

【相关描述】Don't confuse this in-³, meaning "in, into; within", with another in-² Latin prefix meaning "in, into, within, inside, on, toward" or with the Latin prefix in-¹ meaning "not".

【同源单词】inarm, inbeing, inboard, inborn, inbound, inbreathe