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OB – against |
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obstruct |
obdurate |
obfuscate |
obnoxious |
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obsequious |
obstinate |
obstreperous |
obtrusive |
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OMNI – all |
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omnipresent |
omnipotent |
omniscient |
omnivorous |
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ONER – burden |
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onerous |
exonerate |
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OPER – work |
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operate |
cooperate |
inoperable |
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