Englishfor English speakers
non
Prefix
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non or non- means the same as not, but makes not part of the word it changes. When you add non- to a word it makes that word mean the opposite.
That drink is non-alcoholic, it has no alcohol in it.
He is a non-believer; he does not believe at all.
rigid
Adjective
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A rigid object does not bend.
It's possible to use flexible materials to form a rigid structure.
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fixed rather than moving
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rigorous and unbending
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uncompromising