Adjective Usage and Examples | Grammarly
https://www.grammarly.com/blog/adjective14.01.2021 · One more thing you should know about adjectives is that, sometimes, a word that is normally used as a noun can function as an adjective, depending on its placement. For example: Never try to pet someone’s guide dog without asking permission first. Guide is a noun. But in this sentence, it modifies dog. It works the other way, too.