zgrušavati

1. (zgrušavati se) to clot; to curdle
   Kod nekih bolesti krv se ne zgrušava normalno. — With some diseases the blood doesn't clot properly.
   Mleko se brzo zgrušava ako stoji na toplom. — Milk curdles quickly if it's left somewhere warm.
2. (+ acc.) to curdle; to coagulate
   Sirište zgrušava mleko pri pravljenju sira. — Rennet curdles the milk when cheese is made.

Usually used with se: krv se zgrušava.