What part of speech is the word nest?

The word "nest" can be several parts of speech depending on how it's used in a sentence:

* Noun: This is the most common use of the word, referring to a structure built by birds or other animals to hold their eggs and young.

* Example: "The robin built its nest in the oak tree."

* Verb: It can also be used as a verb meaning to build a nest or to settle down comfortably.

* Example: "The birds nested in the hollow of the tree."

* Example: "She nested herself in the armchair with a good book."

So, the part of speech for "nest" depends on its context in the sentence.