remorsefully
Concise Oxford English Dictionary © 2008 Oxford University Press:
remorse/rɪˈmɔːs/
▶noun deep regret or guilt for a wrong committed.
– derivatives
remorseful adjective,
remorsefully adverb.
remorseful adjective,
remorsefully adverb.
– origin ME: from OFr. remors, from med. L. remorsus, from L. remordere ‘vex’, from re- (expressing intensive force) + mordere ‘to bite’.
'remorsefully' also found in these Oxford entries:

