YOU SAID:

understood through tough thorough thought though.

INTO JAPANESE

しかし、厳しい徹底的な思考を通して理解しました。

BACK INTO ENGLISH

However, I understood it through strict and thorough thinking.

INTO JAPANESE

しかし、私はそれを厳密かつ徹底的に考えて理解しました。

BACK INTO ENGLISH

But I thought and understood it rigorously and thoroughly.

INTO JAPANESE

しかし、私はそれを厳密かつ徹底的に考え、理解しました。

BACK INTO ENGLISH

But I thought and understood it rigorously and thoroughly.