Englishfor English speakers
pneumatic
Adjective
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If something is pneumatic, it contains or operates by air or gas under pressure.
adder
Noun
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An adder is a short, rather massive poisonous snake with long front teeth that poison its victims by biting them.
Don't walk in the bush unprotected, you may be bitten by an adder!
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Adder can also stand for any poisonous snake.
Certain poisonous snakes in North America are called adders though they are not true adders.
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Someone or something that adds. Usually a part (circuit) of computer chip.
The CPU contained extra adders to increase speed.