When?
Wann?
Why?
Warum?
What sort/type of…?
Was für…?
What?
Was?
Which?
Welcher/Welche/Welches?
Who?
Wer?
How long?
Wie lang(e)?
How much/many?
Wie viel(e)?
How?
Wie?
Why? How come …?
Wieso?
Where?
Wo?
Where from?
Woher?
Where to?
Wohin?
What with?
Womit?