Deepest
The Deepest
noun, の adjective
The most deep is the deepest.
最深 is a formal word used in geology to describe the deepest point of things like caves and oceans.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
最深３００ｍ
300 meters at its deepest
最深点
deepest point
最深部
deepest part
水深は最深で３００mもある。
The depth of the water is 300 meters at its deepest point.
ここら辺が最深のエリアです。
Around here is the deepest area.
ソグネフィヨルドは、世界最長・最深のフィヨルドです。
Sognefjord is the longest and deepest fjord in the world.