In`ef·fec'tu·al·ly adverb Without effect; in vain. « Hereford . . . had been besieged for about two months ineffectually by the Scots.» Ludlow. Found on http://www.encyclo.co.uk/webster/I/49
adverb in an ineffectual manner; `she tried ineffectually to light the primus, and Thomas came to help her` Found on https://www.encyclo.co.uk/local/20974