to feel uncomfortable because there is not enough fresh air:
Can you open a window? I'm suffocating.
3 [transitive]to prevent a relationship, plan, business etc from developing well or being successful:
Jealousy can suffocate any relationship.
WORD FOCUS: breathe WORD FOCUS: breathe to breathe in:inhaleformal to breathe out:exhaleformal to breathe noisily:sniff, snore (when sleeping) snort, sigh to breathe with difficulty:gasp, pant, wheeze, be short of breath, be out of breath to be unable to breathe:choke, suffocatebreathe ➔ See alsobreathe
Definition from the Longman Dictionary of Contemporary English Advanced Learner's Dictionary.