What part of speech is tank?

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

* Noun: This is the most common usage, referring to a military vehicle. Example: "The enemy tank was destroyed."

* Verb: This is less common but possible, meaning to store something in a tank. Example: "We tanked the water for the garden."

* Slang: In slang, "tank" can be a verb meaning to fail or perform poorly. Example: "The team tanked the game."

So, without context, it's hard to say definitively which part of speech "tank" is.