a, o, b, e, g, n, h, r, t, i, u are letters that make 'breathing out'
hi, re, BR, hin, at, ng, ut, Ea, breathing, thin, out, in, thing, breath, HI, IN, Re, At, Br, In, Th, UT, eat are words within 'breathing out'
1 possible definitions for 'breathing out'
Under this definition, breathing out is a noun and has the following properties:
exhalation, expiration have the same meaning as 'breathing out'
'breathing out' can be a type of breath.
'breathing out' can be a part of breathing, external respiration, respiration, ventilation.
exhale, expire, breathe out are derivatives of 'breathing out'.