unfailingly

From unfailing +‎ -ly or un- +‎ failingly.

unfailingly (comparative more unfailingly, superlative most unfailingly)

1. Without fail; reliably; always.
   • 2014, Michael Bloch, Jeremy Thorpe:

     While unfailingly courteous to the jury, he could be quite sharp with counsel and witnesses, and rattle his sabre at the press: his first reported words in the case were that any journalist thinking of interviewing a juror 'had better bring a toothbrush'.