不断 [ bù duàn ]: unceasing; uninterrupted; continuous; constant

不仅 [ bù jǐn ]: not only (this one); not just (...) but also

不过 [ bù guò ]: only; merely; no more than; but; however; anyway (to get back to a previous topic); cannot be more (after adjectival)

不可 [ bù kě ]: cannot; should not; must not

不是 [ bù shì ]: no; is not; not

More: 不* | *不 | *不*