• Webster's Revised Unabridged Dictionary
    • v. t Misimprove To use for a bad purpose; to abuse; to misuse; as, to misimprove time, talents, advantages, etc.
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Century Dictionary and Cyclopedia
    • misimprove To fail to improve or make a good use of; misapply; neglect opportunities of improving: as, to misimprove time, talents, advantages.
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Chambers's Twentieth Century Dictionary
    • v.t Misimprove mis-im-prōōv′ to apply to a bad purpose: to misuse
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In literature:

To misimprove any measure of knowledge he giveth.
"Christ The Way, The Truth, and The Life" by John Brown (of Wamphray)
True, if misimproved, the same means become only a discipline in vice.
"The Religion of Geology and Its Connected Sciences" by Edward Hitchcock