On another planet, the local terminology for earth, water, light, air and sky, are ‘sky’, ‘light’, ‘air’, ‘water’ and ‘earth’ respectively. If someone is thirsty there, what would he drink

On another planet, the local terminology for earth, water, light, air and sky, are ‘sky’, ‘light’, ‘air’, ‘water’ and ‘earth’ respectively. If someone is thirsty there, what would he drink ?