1) Fruitlessly 2) Futilely 3) In a useless manner 4) In an unavailing manner 5) In vain 6) Inanely 7) Ineffectively 8) Ineffectually 9) Meaninglessly 10) Pointlessly 11) Stupidly 12) To no avail 13) Unsuccessfully Found on https://www.crosswordclues.com/clue/uselessly