purposelessly

English

purposelessly (comparative more purposelessly, superlative most purposelessly)

In a purposeless manner; to no end; for no reason.
- 1907, Barbara Baynton, edited by Sally Krimmer and Alan Lawson, Human Toll (Portable Australian Authors: Barbara Baynton), St Lucia: University of Queensland Press, published 1980, page 216:
  The sparse grey locks he combed were fewer and greyer: and though the accustomed mouth circle was as obdurately set as of old, his head waggled purposelessly: and his hands fumbled stiffly as he folded and replaced his pocket comb.

in a purposeless manner