What is the word family as a simple subject?

The simple subject of the sentence "The word family is a simple subject" is family.

Here's why:

* Simple subject: The main noun or pronoun that performs the action of the verb in a sentence.

* Word: This is part of the phrase describing the subject.

* Is: This is the verb.

Therefore, the simple subject is family because it's the noun that performs the action of "is".