Source : Webster's Revised Unabridged Dictionary (1913)

Screak \Screak\, v. i. [imp. & p. p. {Screaked}; p. pr. & vb. n.
   {Screaking}.] [Cf. Icel. skr[ae]kja to screech. Cf. {Creak},
   v., {Screech}.]
   To utter suddenly a sharp, shrill sound; to screech; to
   creak, as a door or wheel.

Screak \Screak\, n.
   A creaking; a screech; a shriek. --Bp. Bull.

Source : WordNet®

screak
     v 1: make a high-pitched, screeching noise; "The door creaked
          when I opened it slowly" [syn: {squeak}, {screech}, {creak},
           {skreak}]
     2: utter a harsh abrupt scream [syn: {squawk}, {skreak}, {skreigh},
         {screech}]