bù wèn
to pay no attention to
to disregard
to ignore
to let go unpunished
to let off
bù wén bù wèn
not to hear, not to question (idiom)
to show no interest in sth
uncritical
not in the least concerned
bù wèn qīng hóng zào bái
not distinguishing red-green or black-white (idiom)
not to distinguish between right and wrong
zhì zhī bù wèn
to pass by without showing interest (idiom)
bù wèn hǎo dǎi
no matter what may happen (idiom)
bù wèn jiù tīng bù dào jiǎ huà
Don't ask and you won't be told any lies. (idiom)