腹はらに落おちる

expression, ichidan verb

to understand intuitively; to be convinced; to be satisfied with an explanation

Describes a deep, gut-level understanding or acceptance, not just intellectual comprehension. Often used when an explanation finally makes sense or when one is personally convinced.

• 彼かれの説せつ明めいを聞きいて、ようやく腹はらに落おちた。

  After hearing his explanation, I finally understood it intuitively.

• その理り由ゆうを聞きいても、どうも腹はらに落おちない。

  Even after hearing the reason, I'm not really convinced.