As a noun:
* The gardener used a long hose to water the flowers.
* The fire fighters used a large hose to extinguish the blaze.
* My car's radiator hose sprung a leak.
* The mechanic replaced the old hose with a new one.
As a verb:
* The firefighters hosed down the burning building.
* The kids hosed each other with water guns.
* She hosed off the muddy car.
As an idiom:
* "Hose down" means to thoroughly clean something, often with water.
* "Hose someone down" can also be used figuratively to mean to criticize someone harshly.
Let me know if you would like to see more examples!