What part of speech is the word screen?

The word "screen" can be several parts of speech, depending on its use in a sentence:

* Noun: This is the most common use. It refers to a flat surface that displays images or text.

* Example: "The movie was projected on a large screen."

* Verb: This is used to mean "to protect from something" or "to shield from view."

* Example: "They screened the windows with mosquito netting."

* Adjective: This is less common, but can be used to describe something that is like a screen.

* Example: "He wore a screen door to keep the flies out."

So, without context, it's impossible to definitively say which part of speech "screen" is. You need to look at how it's being used in the sentence.