dyspnoeic -
not breathing or able to breathe except with difficulty; "breathless at thought of what I had done"; "breathless from running"; "followed the match with breathless interest"
breathing,
eupneic,
eupnoeic passing or able to pass air in and out of the lungs normally; sometimes used in combination; "the boy was disappointed to find only skeletons instead of living breathing dinosaurs"; "the heavy-breathing person on the telephone"
unventilated not ventilated; "stuffy unventilated rooms"
asphyxiating tending to deprive of oxygen; "asphyxiating gasses"
smothering,
suffocating,
suffocative causing difficulty in breathing especially through lack of fresh air and presence of heat; "the choking June dust"; "the smothering soft voices"; "smothering heat"; "the room was suffocating--hot and airless"
