Synonyms: suffocating, suffocative, smothering
Definition: causing difficulty in breathing especially through lack of fresh air and presence of heat
Usage: the choking June dust; the smothering soft voices; smothering heat; the room was suffocating--hot and airless
Similar words: breathless, dyspneal, dyspneic, dyspnoeal, dyspnoeic
Definition: not breathing or able to breathe except with difficulty
Usage: breathless at thought of what I had done; breathless from running; followed the match with breathless interest