In Cambodia, like many places in South East Asia, do not have access to safe clean drinking water. When I stayed on Koh Rong we depended on a ferry arriving every evening to bring big 15l barrels of fresh water to the restaurants and dive shops. Unfortunately sometimes the water would not arrive.
Due to the language difficulties between the local Khmer people and us, we would often have to result in sign language to attempt to communicate. We did figure out “tuk” means water.