Is the word into an adverb?

The word "into" can act as a preposition or as a part of a phrasal verb. It's not typically considered an adverb.

Here's how it works:

Preposition:

* Example: The cat jumped into the box. (Indicates direction or movement)

Phrasal Verb:

* Example: He tuned into the radio show. (Combines with a verb to create a new meaning)

Adverb:

* Example: The car drove slowly down the road. (Modifies a verb, adjective, or another adverb)

While "into" can sometimes describe how something is done (like "He looked into the problem deeply"), it's more accurately described as part of the phrasal verb "look into".