Wiktionary
suffocates
vb. (en-third-person singular of: suffocate)
Usage examples of "suffocates".
On the contrary, at the bottom of wells fine air is lacking but the thick and mephitic air remains, and it suffocates both men and a candle's flame.
Consequently he probably suffocates more quickly, so if he could be trapped in a sea of liquid fire that would finish him.
If Longbottom suffocates it will mean a lot of tedious paperwork and I am afraid I shall have to mention it on your reference if ever you apply for a job.