superlatively
From Longman Dictionary of Contemporary Englishsuperlativelysu‧per‧la‧tive‧ly /suːˈpɜːlətɪvli, sjuː- $ sʊˈpɜːr-/ adverb VERYextremely superlatively happyExamples from the Corpussuperlatively• Kate wasn't surprised; yesterday must have taken its toll even though he was superlatively fit.