ump

noun

An umpire.

verb

To act as an umpire.

uncap

verb
  1. To remove a cap or cover from.
  2. To take off one's cap.

unclamp

verb
  1. remove the clamp from.
    all you need to do is unclamp the leaking hose, put on a new one, and then
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unclasp

verb
  1. To release the clasp from something
  2. To become unfastened
  3. To separate from being clasped
    They unclasped
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unclip

verb

release from being fastened or held with a clip.