deep
US /diːp/
UK /diːp/

1.
extending a long way down from the top or surface
:
•
The well is very deep.
•
She took a deep breath.
2.
extending a long way back from the front or surface
:
•
The closet is quite deep, so it can hold a lot.
•
The stage was very deep, allowing for elaborate sets.
3.
4.
(of a sound) low in pitch
:
•
He has a very deep voice.
•
The organ produced a deep, resonant tone.
1.
2.
far into a subject or complex matter
:
•
Let's not go too deep into this topic right now.
•
He delved deep into the philosophical texts.