Used to warn of danger in signs and notices.
Something spoken or written that is intended to warn.
The action of the verb warn; an instance of warning someone.
An exclamation used to express pleasant or unpleasant mild surprise, indignation, or impatience.
For which cause, reason, or purpose.
The cause, reason, or purpose for which.
Introducing a noun or other phrase.
Introducing a verb phrase (bare infinitive clause).
Introducing a complete question.
With a negative, used rhetorically to make a suggestion.
Reason.