资料来源 : Webster's Revised Unabridged Dictionary (1913)

Croak \Croak\ (kr?k), v. i. [imp. & p. p. {Croaked}. (kr?kt); p.
   pr. & vb. n. {Croaking}.] [From the primitive of AS.
   cracettan to croak as a raven; akin to G. kr?chzen to croak,
   and to E. creak, crake.]
   1. To make a low, hoarse noise in the throat, as a frog, a
      raven, or a crow; hence, to make any hoarse, dismal sound.

            Loud thunder to its bottom shook the bog, And the
            hoarse nation croaked.                --Pope.

   2. To complain; especially, to grumble; to forebode evil; to
      utter complaints or forebodings habitually.

            Marat . . . croaks with reasonableness. --Carlyle.

资料来源 : WordNet®

croaking
     adj : like the sounds of frogs and crows; "a guttural voice";
           "acres of guttural frogs" [syn: {croaky}, {guttural}]
     n : a harsh hoarse utterance (as of a frog) [syn: {croak}]