What part of speech is reservoir?

"Reservoir" can be a few different parts of speech, depending on how it's used:

* Noun: This is the most common usage. It refers to a natural or artificial lake used for storing water.

* Example: "The dam created a large reservoir for irrigation."

* Adjective: This usage is less common, but it describes something that holds or stores something, often in large quantities.

* Example: "The country's reservoir of oil is dwindling."

Let me know if you'd like to see more examples!