steep inphrasal verb
Definition of steep in
1 : to make (someone) know and understand a lot about (something) Prior to his trip, he spent a few weeks steeping himself in the language. —often used as (be) steeped in She was steeped in the classics.
2 —used as (be) steeped in to say that there is a lot of something associated with a place, time, etc. an area steeped in history