no
bu dong mean "I don't understand"
no
Bu means NO
Bu pretty much means don't. Ex. Wo Bu Xi Huan Mao.
I don't know what exactly charasters you mean by "bu". There are too many characters for "bu". Each has different meanings.
I believe you mean: 对不起 Duì bù qǐ
the most likely meaning is "no" but it could also mean 'cloth' or 'step' depending on the context or tone.
Quiz, in simplified Chinese would be written as 考试, and read as 'kao shir'
No problem
The translation for 'no' into Chinese is '不' or 'bu'.
In simplified chinese, it would look like 天使,and read as tian shir
pao bu