The Collaborative International Dictionary of English v.0.48:

Wrawl \Wrawl\ (r[add]l), v. i. [Cf. Dan. vraale, Sw. vr[*a]la to
   brawl, to roar, Dan. vraal a bawling, roaring, vr[ae]le to
   cry, weep, whine.]
   To cry, as a cat; to waul. [Obs.] --Spenser.
   [1913 Webster]
   [1913 Webster]

WordNet (r) 3.0 (2006):

wrawl
    v 1: cry loudly, as of animals; "The coyotes were howling in the
         desert" [syn: howl, wrawl, yammer, yowl]