obdurately
advEtymology From obdurate + -ly.
1
In an obdurate manner; stubbornly, intractably or inflexibly.
- 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.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: