super-superlative
/ˌsuːpəsuːˈpəːlətɪv/ /ˌsuːpəsʊˈpəːlətɪv/ /ˌsjuːpəsjuːˈpəːlətɪv/adjective
More than superlative; of the very highest quality or degree.
noun
A degree beyond the superlative; a super-superlative form.
Origin
Early 17th century; earliest use found in R. C. (fl. c1616). From super- + superlative.