breathing in

(noun) the act of inhaling; the drawing in of air (or other gases) as in breathing. Synonyms: inhalation, inspiration, aspiration, intake, breathing in.

(verb) draw in (air). Synonyms: inhale, inspire, breathe in. Examples: "Inhale deeply." "Inhale the fresh mountain air." "The patient has trouble inspiring." "The lung cancer patient cannot inspire air very well."