GNU Collaborative International Dictionary of English

Found 2 definitions

1.       
   Screak , v. i. [imp. & p. p. Screaked ; p. pr. & vb. n. Screaking.] [Cf. Icel. skraekja to screech. Cf. Creak, v., Screech.] To utter suddenly a sharp, shrill sound; to screech; to creak, as a door or wheel.
   1913 Webster
         
       

2.       
   Screak, n. A creaking; a screech; a shriek.
   Bp. Bull.
   
   1913 Webster