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Bone up phrasal verb
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Meaning: Study hard for a reason
(Intransitive | International English)
» Example: I will have to BONE UP to get a good result.
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Meaning: Study hard for a reason
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Bone up on phrasal verb
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Meaning: Study hard for a goal or reason
(Inseparable | International English)
» Example: I need to BONE UP ON my French grammar for the test.
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Meaning: Study hard for a goal or reason