purr /ˈpɝ/
  (vt.)(vi.)咕嚕咕嚕叫,發出喉音咕嚕咕嚕聲
  Purr, n. The low murmuring sound made by a cat; pur. See Pur.
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  Purr v. i. & t. To murmur as a cat. See Pur.
  Pur, n. The low, murmuring sound made by a cat to express contentment or pleasure. [Written also purr.]
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  Pur v. i. [imp. & p. p. Purred p. pr. & vb. n. Purring.]  To utter a low, murmuring, continued sound, as a cat does when pleased. [Written also purr.]
  purr
       n : a low vibrating sound typical of a contented cat
       v 1: make a soft swishing sound; "the motor whirred"; "the car
            engine purred" [syn: whizz, whiz, whirr, whir, birr]
       2: indicate pleasure by purring; characteristic of cats [syn: make
          vibrant sounds]