不 論 bú lùn : no matter (what, who, how, etc.); whether ... or ...; regardless of

不 顧 bù gù : in spite of; regardless of

不 管 bù guǎn : no matter (what, how); regardless of; no matter

不 論 bù lùn : no matter (what, who, how, etc.); whether; or; regardless of

無 論 wú lùn : no matter what|how; regardless of whether...