That stifles.

present participle of stifle

The act by which something is stifled.

plural of stifling

(transitive, also figuratively) To make (an animal or person) unconscious or cause (an animal or person) death by preventing breathing; to smother, to suffocate.

(rare) An act or state of being stifled.

(zootomy) The joint between the femur and tibia in the hind leg of various four-legged mammals, especially horses, corresponding to the knee in humans.

(transitive) To cause (a dog, horse, or other four-legged mammal) to dislocate or sprain its stifle joint.

That has been interrupted, suppressed etc

simple past tense and past participle of stifle