underdo

(un′dər do̵̅o̅)

transitive verb underdid, underdone, underdoing

to do less than is usual, needed, or desired

See underdo in American Heritage Dictionary 4

transitive verb un·der·did (-dĭdˈ), un·der·done (-dŭnˈ), un·der·do·ing, un·der·does (-dŭzˈ)
To do to an insufficient degree, especially to cook for too short a time.
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