Here is a worksheet on the Latin roots ig, il, in, im, ir; they mean not and without. These are though of in English language arts classes as prefixes, which they are for the purposes of this worksheet. You’ll find these root at the beginning of many high-frequency words in English adjectives in English such as ignorant and illegal. And while words like illegible, immutable, incongruous, and irrefutable (all present in this document) are less frequently used in common discourse, they are quite useful in academic prose.
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