not only ... (but also); not merely; as well as
Formal/literary equivalent of だけでなく. Used to add another element, often with a following も or さえ.
See also: だけでなく
furthermore; besides; moreover; what's more
Used at the beginning of a sentence to add information, similar to さらに or そのうえ. Formal register.
He speaks not only Japanese but also English fluently.
This shop is expensive. Moreover, the service is poor.