■ related pronoun & determiner used to emphasize a lack of restriction in referring to any thing, no matter what.
■ interrogative pronoun used for emphasis instead of ‘what’ in questions.
■ adverb
1》 [with negative ] at all; of any kind.
2》 informal no matter what happens.
■ exclamation informal a response indicating a reluctance to discuss something, often implying indifference.
Usage
In the emphatic use ( ~ was she thinking of? ), it is acceptable to use either ~ or what ever . See usage at however .