breathing
noun
the bodily process of inhalation and exhalation; the process of taking in oxygen from inhaled air and releasing carbon dioxide by exhalation
adjective
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”
Oppositesbreathless
Source: WordNet 3.1, Princeton University