what / that thing (used in place of words you can't remember at the moment.)

what

what is this?

come again? what did you say again? (asking the listener to repeat what was said) / what!? (expressing disbelief and shock)

阿南: Anan, Tokushima

Used in reproach. / Used in relief.

Used with uncertain information. / no matter the circumstances

Used other than figuratively or idiomatically: see なん, でも.

(more informal) Alternative form of なのだ (na no da)

何: how many; many