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Negative Prefix
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tolerant
intolerant
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comfortable
uncomfortable
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Okay!
logical
illogical
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Okay!
distinguishable
indistinguishable
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Okay!
peccable
impeccable
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Okay!
available
unavailable
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Okay!
perfect
imperfect
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Okay!
vincible
invincible
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Okay!
material
immaterial
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Okay!
understand
misunderstand
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Okay!
possible
impossible
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Okay!
legible
illegible
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Okay!
redeemable
irredeemable
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Okay!
respective
irrespective
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Okay!
secure
insecure / unsecure
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Okay!
advised
ill-advised
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Okay!
reversible
irreversible
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Okay!
appropriate
inappropriate/ misappropriate
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Okay!
safe
unsafe
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Okay!
visible
invisible
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Okay!
regular
irregular
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Okay!
believable
unbelievable
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Okay!
balanced
imbalanced
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Okay!
relevent
irrelevent
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Okay!
pede
impede
Oops!
Okay!
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