底そこ意い

noun

true intention; underlying motive

Refers to a person's real, often hidden, intention or motive behind their words or actions. Commonly used in expressions like 底意を見抜く (see through someone's true intentions).

• 彼かれの親しん切せつには底そこ意いがあるように感かんじた。

  I felt there was an ulterior motive behind his kindness.

• 相あい手ての底そこ意いを見み抜ぬくのは難むずかしい。

  It's difficult to see through someone's true intentions.