Reducing temperature and compressing volume are two ways of gas liquefaction. Butane gas in gas lighters is liquefied by compressing the volume.

Butane will vaporize quickly and absorb a lot of heat after leaking, so if it is accidentally broken, it will feel very cold if you pick up the wreckage as soon as the liquid inside disappears.

So the answer is: compress the volume; Cold; Vaporization; absorb