Should the phrase in be hyphenated?

The word "in" is not hyphenated. It's a simple preposition and doesn't need a hyphen in most cases.

However, there are a few exceptions:

* Compound adjectives: If "in" is part of a compound adjective before a noun, it might need a hyphen. For example: "an in-depth analysis" or "an in-between size."

* Avoiding ambiguity: If not hyphenating "in" creates confusion, it might be better to hyphenate it. For example: "the in-house team" is clearer than "the in house team."

Generally, though, "in" is not hyphenated.