奥底

1. Origins, structure, and basic meaning

• Structure: 奥底, read おくそこ, means the deepest part of a place or the hidden depths of someone's mind.
• Basic usage: It describes the depths of a well or anxiety held deep within the mind.
  • 深い井戸の奥底から、かすかに水の音が聞こえた。

2. Common pitfalls and similar expressions

• Emphasis beyond 底
  • 底 refers to the bottom of an object or space, while 奥底 emphasizes a depth that is hard to reach or reveal. 心の奥底 figuratively treats the mind as a space with hidden depths.