Even though dictionaries dont bring up as a synonym delve into with scrutinize I can see a overlap.
As far as I know for example we can scrutinize an art paint in order to find out if it is geniue or we can scrutinize in order to understand its deep meaning by deciphering every symbol on it.Another example I learned a mum can scrunitize her children's clothing to make sure they were dressed properly for school.
Can we do them with the verb delve into ?
Or delve into implies more like to trying find out something clandestine.
And I added the word immerse because I'd like to ask if we can scrutinize or devel into a book or movie which has engrossing and intricate plot in the sense of immerse.