This is the 1635th most frequent Japanese word.
深い
Deep.
Here, '深い' (fukai) is used to describe the physical depth of an object, specifically a lake.
その湖はとても深いです。
The lake is very deep.
Here, '深い' is metaphorically used to describe a level of intellectual depth.
彼は深い考えを持っています。
He has profound thoughts.
Here, '深い' conveys an emotional depth in human relationships.