profound; deep; unfathomable; esoteric
Describes ideas, meaning, or knowledge that is deep and not easily understood; often used in literary, philosophical, or spiritual contexts.
His words carry a profound meaning.
この哲学書は深遠で、理解するのが難しい。
This philosophy book is deep and difficult to understand.
深遠 is a more literary, formal term for profound or abstract depth, while 奥深い is a common adjective usable in everyday speech.
From 深 (deep) and 遠 (far, distant), suggesting depth that is far-reaching and hard to grasp.