What is "cruddle"

Curdle \Cur"dle\ (k[^u]r"d'l), v. i. [From Curd.] [Sometimes written crudle and cruddle.]

1. To change into curd; to coagulate; as, rennet causes milk to curdle.
   --Thomson.

2. To thicken; to congeal.

   Then Mary could feel her heart's blood curdle cold.
   --Southey.

vb. (context obsolete English) To curdle.