This is the 1278th most frequent Spanish word.
gas
A substance in a gaseous state.
Here, 'gas' refers to a fuel used in vehicles or for heating.
El tanque de gas está lleno.
The gas tank is full.
In this case, 'gas' implies flammable fuel used in appliances, typically natural gas or propane.
Hay una fuga de gas en la cocina.
There is a gas leak in the kitchen.
Here, 'gas' is used metaphorically to describe enthusiasm or physical energy.