Adjective: suffocative
- Causing difficulty in breathing especially through lack of fresh air and presence of heat
"The suffocative atmosphere in the crowded room made people feel faint";
- smothering, suffocating, choking
See also: breathless, dyspneal [N. Amer], dyspneic, dyspnoeal [Brit, Cdn], dyspnoeic
Encyclopedia: Suffocative