Толковый словарь английского языка Oxford English Reference - whatever

adj. & pron. 1 = WHAT (in relative uses) with the emphasis on indefiniteness (lend me whatever you can; whatever money you have). 2 though anything (we are safe whatever happens). 3 (with neg. or interrog.) at all; of any kind (there is no doubt whatever). 4 colloq. = what ever. Phrases and idioms or whatever colloq. or anything similar.