Bedeutung von “deep” — Learner’s Dictionary

deep

adverb us uk /diːp/

B1 a long way into something from the top or outside:

They travelled deep into the forest.
She pushed her hands deep into her pockets.
deep down

B2 If you know or feel something deep down, you are certain that it is true, or you feel it strongly although you do not admit it or show it:

Deep down, I knew that I was right.
go/run deep

If a feeling or a problem goes deep, it is very strong or serious and has existed for a long time.

(Definition von “deep adverb” aus dem Cambridge Learner's Dictionary © Cambridge University Press)