The suffix is added to word part pneumono-/ to refer to the surgical procedure of puncturing the lung and aspirating fluids like blood, pus, & lymph. this procedure promotes easy breathing and cell oxygenation

-centesis                        

Explanation:

By adding the suffix " -centesis " to the word ' Pneumono- ' , it becomes "Pneumonocentesis".

In medical terms Pneumonocentesis is process of artificial aspiration of the lungs. It is a medical surgery in which the lung is punctured and fluids like pus, blood and lymph are aspirated. It procedures helps in drawing breathe and supports cell oxygenation and easy breathing.

Hence the answer is -- "-centesis"

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