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unfair
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untie
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disbelieve
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unhappy
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unreliable
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untrue
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discontinue
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unreal
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unknown
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unkind
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unlucky
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unfriendly
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disallow
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unripe
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disrespect
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disloyal
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dislike
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unlock
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unzip
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disagree
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disorder
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dishonest
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unsure
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uninteresting
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distrust
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disappear
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unsafe
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uncomfortable
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unwell
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unclear
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discomfort
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unload
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disobey
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unpleasant