何々

what

used when asking about or referring to multiple unspecified things

so-and-so; such and such; something (or other)

used when listing things that are unknown or do not need to be specified

what?; wait; hang on

used when asking for confirmation upon hearing something surprising

well, well; let's see

used when about to read a letter or document

no; oh (not at all); please; there, there

used to dismiss someone's words or concerns