It's definitely not an adjective. ) If you take "prior to" as a phrase, it's synonymous with "before," which can work as an adverb or a preposition, if I'm not mistaken. It happened before the flood.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
Avangido we have compound prepositions?Yes, we do. Well, I'm sure I do. If you do too, then we do.