Word Study
respell |
resperse |
respersion |
respighi |
respirability |
Respirable
| respiration
| respirational
| respirative
| respirator
| respiratory
Respirable
CIDE DICTIONARY
Respirable, a. [Cf. F. respirable.].
Suitable for being breathed; adapted for respiration. [1913 Webster]
OXFORD DICTIONARY
Respirable, adj. (of air, gas, etc.) able or fit to be breathed.
Etymology
F respirable or LL respirabilis (as RESPIRE)
For further exploring for "Respirable" in Webster Dictionary Online
(NT only) to listen to the NET Bible 
