adverb

why

why

Why are you late?

Why are you late?

I don't know why he left.

I don't know why he left.

That is the reason why I came.

That is the reason why I came.

((auxiliary verb)) ((subject)) ((verb))? used to ask for a reason. Why did you say that?

((clause)) used as a conjunction. He explained why he was absent.

Synonyms: for what reason, for what purpose

From Old English 'hwȳ', the instrumental case of 'hwæt' (what), meaning 'for what (reason)'.

'Why' asks for a reason or an explanation. Think of it as asking 'for what reason?'.

This page is designed for learning support. Please use it as a learning reference, not as a formal reference.