何

in some way; somehow or other

somewhere or other

currently nowhere to be seen; unknown where it went; disappeared into thin air

Conjunction

because; for; the reason why is ...

since some time or another; since who-knows-when

more than usual; especially; particularly

Usu. as ～わからない

what's what; heads or tails

any one; any; whichever

all sorts of things; (anything and) everything

by all means; at any cost

of no use whatsoever; good for nothing; useless

even so; anyhow; at any rate

as always; as ever; though it's always the case

so what!; who gives a damn?

no matter what it takes; by any means necessary; at all costs; by hook or by crook

ordinary; nothing special; nothing to exclaim over

before one knows it; without realizing; unawares; unnoticed

anyway; either way; one way or the other; whichever; whatever

showing no concern at all; being not at all bothered; devil-may-care attitude

Colloquial

what on Earth is this?

Used rhetorically as 〜か, 〜でしょうか, etc.

something one finds questionable; something one finds fault with

no matter what; whatever happens; in any situation; rain or shine

anything; whatever; whatever one likes

this and that; one thing or another

whereabouts

Formal or literary term

why