Water

"Water! Water! Is there water?"

- Finn

Water was a liquid necessary for most life forms, whether animal or vegetal, sentient or non-sentient. Many planets were covered in it and many species, including the Mon Calamari, Quarren and Gungans, evolved on, under, and around water. On arid worlds like Tatooine, moisture farmers used vaporators to collect water from the atmosphere. The Tusken Raiders of Tatooine believed that all water was sacred and promised to them, resulting in them raiding local moisture farms set up by colonists. Frozen water was known as ice.

Non-canon appearances

 * Star Wars Epic Yarns: The Empire Strikes Back