不但
Written bù dàn, said bú dàn — 不 becomes bú before a fourth tone.
Meaning
- not only (... but also ...)
Example sentence
他不但会说普通话，而且会说上海话。
Not only can he speak Mandarin, but Shanghainese as well.
Characters in 不但
不 not plus 但 only. Not only, and it wants 而且 or 也 in the second clause to complete it.