The Collaborative International Dictionary of English v.0.48:

Murder \Mur"der\, v. t. [imp. & p. p. Murdered
   (m[^u]r"d[~e]rd); p. pr. & vb. n. Murdering.] [OE.
   mortheren, murtheren, AS. myr[eth]rian; akin to OHG.
   murdiren, Goth. ma['u]r[thorn]rjan. See Murder, n.]
   1. To kill with premediated malice; to kill (a human being)
      willfully, deliberately, and unlawfully. See Murder, n.
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   2. To destroy; to put an end to.
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            [Canst thou] murder thy breath in middle of a word?
                                                  --Shak.
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   3. To mutilate, spoil, or deform, as if with malice or
      cruelty; to mangle; as, to murder the king's English.
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   Syn: To kill; assassinate; slay. See Kill.
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