Crud·dle v. i. To curdle. [Obs.]
     See how thy blood cruddles at this.   --Bea░ & FL.
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  Cur·dle v. i.  [Sometimes written crudle and cruddle.]
  1. To change into curd; to coagulate; as, rennet causes milk to curdle.
  2. To thicken; to congeal.
     Then Mary could feel her heart's blood curdle cold.   --Southey.