Explain how a word can be a morphemic noun and a syntactic adverb in the same sentence.

Let's take a look at the word "quiet" - as in "in the quiet of the night" - we see that it's a noun (and a morphemic noun, which means that as a morpheme, before any suffixes are added, it's a noun).

We can add suffixes to the morphemic nouns - quietly for example - it's an adverb now!

So in a "in a quiet of the night, she quietly sneaked pas the guards" - here, quiet is both a morphemic noun and an adverb