Used other than figuratively or idiomatically: see as, in.
In the sense of.
Introducing a noun or other phrase.
For which cause, reason, or purpose.
The cause, reason, or purpose for which.
Introducing a verb phrase (bare infinitive clause).
Introducing a complete question.
With a negative, used rhetorically to make a suggestion.
An exclamation used to express pleasant or unpleasant mild surprise, indignation, or impatience.
Reason.