prefiex im/ non/ in/ un
Usually:in + ADJ,
e.g. inaccurate, inconsistent, incapable, immature, impolite,
impersonal,
immobile, immortal, immoral
when the root of the word starts with an M or P, i.e. bilabial
consonants,
'iN' becomes 'iM', in expectation of the following sound.
non - ( Adj), it is added in the front but don't really form a new word,
e.g. non-flammable, non-toxic, non-compliant
un + Verb,to REVERSE or UNDO the action of the original verb
e.g., undo, undress, unfold, uncover, unseal
dis + Verb, to do just the opposite
e.g. disqualify, discontinue, disembark, disassemble,
disappear,
disagree, disapprove, disbelieve
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