REMORSEFULLY
ruefully, contritely, remorsefully
(adverb) in a rueful manner; “‘I made a big mistake,’ he said ruefully”
Source: WordNet® 3.1
Etymology
Adverb
remorsefully (comparative more remorsefully, superlative most remorsefully)
With remorse; in a remorseful manner.
Source: Wiktionary
REMORSEFUL
Re*morse"ful (-mrs"fl), a.
1. Full of remorse.
The full tide of remorseful passion had abated. Sir W. Scott.
2. Compassionate; feeling tenderly. [Obs.] Shak.
3. Exciting pity; pitiable. [Obs.] Chapman.
– Re*morse"ful*ly, adv.
– Re*morse"ful*ness, n.
Source: Webster’s Unabridged Dictionary 1913 Edition