gas
In a technical sense, the word evokes a feeling of invisibility and expansion, describing elements that lack a fixed shape. It carries a clinical, scientific weight when used in chemistry or physics contexts.
Countable when referring to a specific type of chemical element (noble gases). Uncountable when referring to the fuel in a car tank.
Meanings
A substance in a state of matter that expands to fill any available space.
"The balloon was filled with helium gas."
Fuel used to power internal combustion engines, specifically gasoline.
"I need to stop at the station to get some gas."
To fill a space with gas, often for the purpose of killing or disinfecting.
"The technicians had to gas the warehouse to kill the pests."
To talk excessively or idly about trivial matters.
"They spent the whole afternoon just gassing away."