This is the 685th most frequent Korean word.
가스
Gas.
Here, '가스' refers to cooking gas or natural gas used as a fuel source in households.
가정에서는 요리를 위해 가스를 사용합니다.
At home, gas is used for cooking.
In this sentence, '가스' refers to helium gas, a specific type of gas used for demonstration or entertainment purposes.
그는 헬륨 가스를 마시고 목소리가 변했다.
He inhaled helium gas, and his voice changed.
Here, '가스' is part of the term '주유소', which refers to a gas station implying the fuel (gasoline or other types) used for vehicles.