to cause (a person) to die or be very ill by stopping enough air from entering the lungs

cut off air

the valve in a petrol engine, used to control the intake of hair

smother, block

to make (e.g. a blood vessel) tight or smaller

inhibit

an act of killing a wild animal, person etc

deprive of existence; destroy

to kill (a person, animal) by keeping air from the mouth; to use a cover or covering to put out (a fire)

extinguish; cover, hide

(to make) a sucking sound as when feet are lifted from stiff, sticky mud

suppress, restrain

to keep (a feeling etc) back

prevent, restrain

(to cause a person, animal) to have great difficulty in breathing (and die)

choke

to seize (a person) by the throat and stop her or his breathing; a valve controlling the flow of steam, gas etc in an engine

choke

(to cause something) to become tight(er)

constrict

to twist, squeeze, (something)

twist, contort