get to the bottom of

Verb

idiomatic transitive

(idiomatic, transitive) To come to understand, discover the truth about, or solve.

Japanese Meaning

真相を突き止める / 問題の核心を解明する / 原因や本質を明らかにする

The detective was determined to get to the bottom of the mysterious disappearance, no matter how long it took.

刑事は、その不可解な失踪の真相を、どれだけ時間がかかっても突き止める決意をしていた。

Sense（1）

(idiomatic, transitive) To come to understand, discover the truth about, or solve.

gets to the bottom of

（ present singular third-person ）

getting to the bottom of

（ participle present ）

got to the bottom of

（ past ）

got to the bottom of

（ UK participle past ）

gotten to the bottom of

（ US participle past ）