LEARN + JAPANESE / Note 152 JLPT N4

Not Just This, But Also (だけでなく〜も)

だけでなく attaches after a noun, adjective, or plain verb form and means “not just this,” always paired with も later in the sentence to add the extra item, “not just X, but Y too.”

In Real Life
だけ, which you already know, sets a limit, “only this.” だけでなく actively denies that limit, “not only this,” always followed by も to name what else belongs in the picture, together forming a single, deliberate correction to a too-narrow assumption.
In Real Life
In casual speech, だけでなく often shortens to だけじゃなくて, functionally identical but a bit more relaxed, common when listing several selling points of something, an apartment, a product, a plan.

Vocabulary

JapaneseEnglish