のもと

source; cause

→ の
phrase Rare #28,314
source; cause Often means the source or cause of something. After a person's name, it can also mean that person's place or home.
JA: 小さな誤解が争いのもとになった。
EN: A small misunderstanding became the cause of the argument.

失敗のもとさ

That's a recipe for failure.

— シティ・オブ・ゴッド (2002)

浪費は欠乏のもと。

Waste leads to want.

あの人たちのトラブルのもとは些細なことだ。

The root of their trouble is something trivial.

成人同士が合意のもと合法に結婚したんだ文句は言わせない

We're consenting adults, and we got legally married. I won't hear any complaints.

— ANORA アノーラ (2024)

私のコーチは「失敗は成功のもと」と言った。

My coach said, “Failure is the mother of success.”

トムがボストンにいた時、メアリーのもとを訪れる機会はなかった。

When Tom was in Boston, he never had a chance to visit Mary.

彼の努力が成功のもとになった。

His efforts laid the foundation for his success.