Englishunduly
adverb
that may seem an unduly harsh judgment:
excessively, immoderately, intemperately, disproportionately, out of all proportion, inordinately;
superfluously, too, overly, overmuch;
unnecessarily, needlessly;
unwarrantedly, unjustifiably, unreasonably;
inappropriately, unsuitably, improperly, ill-advisedly.
▷antonyms duly, appropriately.