WHATEVER
whatever, any(a), whatsoever
(adjective) one or some or every or all without specification; “give me any peaches you don’t want”; “not any milk is left”; “any child would know that”; “pick any card”; “any day now”; “cars can be rented at almost any airport”; “at twilight or any other time”; “beyond any doubt”; “need any help we can get”; “give me whatever peaches you don’t want”; “no milk whatsoever is left”
Source: WordNet® 3.1
Etymology
Determiner
whatever
No matter what; for any
(relative) Anything that.
Pronoun
whatever
No matter what; for any
(relative) Anything; sometimes used to indicate that the speaker does not care about options.
Interjection
whatever
(colloquial, dismissive) A holophrastic expression used discourteously to indicate that the speaker does not consider the matter worthy of further discussion.
Usage notes
• Tone of voice is particularly important here in playing up or playing down the dismissive quality of the word.
Synonyms
• so what
• whoopee do
• meh
• whatev
Adjective
whatever (comparative more whatever, superlative most whatever)
(colloquial) Unexceptional or unimportant; blah.
(dated, postpositive) At all, absolutely, whatsoever.
Anagrams
• everwhat
Source: Wiktionary
What*ev"er, pron.
Definition: Anything soever which; the thing or things of any kind; being
this or that; of one nature or another; one thing or another;
anything that may be; all that; the whole that; all particulars that;
– used both substantively and adjectively.
Whatever fortune stays from his word. Shak.
Whatever Earth, all-bearing mother, yields. Milton.
Whatever be its intrinsic value. J. H. Newman.
Note: Whatever often follows a noun, being used elliptically. "There
being no room for any physical discovery whatever" [sc. it may be].
Whately.
Source: Webster’s Unabridged Dictionary 1913 Edition