suffocate

The smoke and fumes almost suffocated me.

The baby suffocated under its pillow.

The frogspawn needs air and would suffocate in the stagnant pool below.

I nearly suffocated when the pipe of my breathing apparatus came adrift.

Prevents the breath myospasm to cause to suffocate, when necessity makes a great effort the tube incision, the intermittent positive pressure gives the oxygen.