Webster's Revised Unabridged Dictionary · 1913

Sadly

Sadly , adverb

1.
Wearily; heavily; firmly. [Obsolete]
In go the spears full sadly in arest. — Chaucer
2.
Seriously; soberly; gravely. [Obsolete]
To tell thee sadly, shepherd, without blame Or our neglect, we lost her as we came. — Milton
3.
Grievously; deeply; sorrowfully; miserably.
He sadly suffers in their grief. — Dryden