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wash one’s hands of: Idiom Meaning and Origin

up to the hub: Idiom Meaning and Origin

up to par: Idiom Meaning and Origin

up to one’s ears: Idiom Meaning and Origin

up the boohai: Idiom Meaning and Origin

up one’s sleeve: Idiom Meaning and Origin

up on: Idiom Meaning and Origin

up hill and down dale: Idiom Meaning and Origin

unused to: Idiom Meaning and Origin

under way: Idiom Meaning and Origin

under the rug: Idiom Meaning and Origin

under the microscope: Idiom Meaning and Origin