curdle

verb

cur·dle | \ ˈkər-dᵊl

curdled; curdling\ ˈkərd-liŋ

, ˈkər-dᵊl-iŋ \

Definition of curdle

1 : to form curds also : to congeal as if by forming curds a scream curdled in her throat

2 : to go bad or wrong : spoil

1 : to cause curds to form in curdled milk

2 : spoil, sour