Burr v. i. [imp. & p. p. Burred p. pr. & vb. n. Burring.] To speak with burr; to make a hoarse or guttural murmur.
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  bur
       n 1: seed vessel having hooks or prickles [syn: burr]
       2: small bit used in dentistry or surgery [syn: burr]
       v : remove the burrs from [syn: burr]
       [also: burring, burred]
  burred
       adj : having or covered with protective barbs or quills or spines
             or thorns or setae etc.; "a horse with a short bristly
             mane"; "bristly shrubs"; "burred fruits"; "setaceous
             whiskers" [syn: barbed, barbellate, briary, briery,
              bristled, bristly, burry, prickly, setose, setaceous,
              spiny, thorny]