Learn how to say Pneumatically correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word pneumatic:
containing or operated by air or gas under pressure:
the machines with pneumatic loading are more efficient
Zoology (chiefly of cavities in the bones of birds) containing air.
mid 17th century: from French pneumatique or Latin pneumaticus, from Greek pneumatikos, from pneuma ‘wind’, from pnein ‘breathe’
Remember that pneumatic is spelled with pneu- at the beginning (it is from Greek pneuma ‘wind’).