のみならず

not only, as well as

preposition Rare #44,548
not only, as well as A formal expression meaning “not only”; it is commonly followed by も to introduce the additional item.
JA: 彼は日本語のみならず英語も話す。
EN: He speaks not only Japanese but English as well.

彼は英語のみならずフランス語も話すことができる。

He can speak not only English but also French.

社員のみならず考え方の多様性です

It’s not just diversity among employees, but diversity of thought as well.

— ブゴニア (2025)

時は虚偽のみならず真実も明らかにする。

Time reveals not only falsehoods but also the truth.

彼女のみならず彼女の息子達も幸せだった。

Not only she but also her sons were happy.