sorrowfully

Concise Oxford English Dictionary © 2008 Oxford University Press:
sorrow/ˈsɒrəʊ/

▶noun a feeling of deep distress caused by loss or disappointment.

■ a cause of sorrow.

■ the outward expression of grief.

▶verb feel sorrow.

– derivatives
sorrowful adjective,
sorrowfully adverb,
sorrowfulness noun.

– origin OE sorh, sorg (n.), sorgian (v.), of Gmc origin.