1. what (used when asking about or referring to multiple unspecified things)

2. so-and-so; such and such; something (or other) (used when listing things that are unknown or do not need to be specified)

3. what?; wait; hang on (used when asking for confirmation upon hearing something surprising)

4. well, well; let's see (used when about to read a letter or document)

5. no; oh (not at all); please; there, there (used to dismiss someone's words or concerns)