What is the meaning of Sadly?

In a sad manner; sorrowfully.

Unfortunately, sad to say.

In a manner to cause sadness; badly; terribly.

Very much (of a desire etc.); dearly; urgently.

Deeply, completely.

totally, completely, deeply

steadily, firmly (with stability):

1. fixedly, steadfastly, undoubtedly
2. carefully (with due effort or consideration)
3. intensely, strongly (with vigour or force)

fixedly, steadfastly, undoubtedly

carefully (with due effort or consideration)

intensely, strongly (with vigour or force)

solidly, closely (creating density)

gravely (with seriousness)

sadly, sorrowfully (with sorrow)

Source: wiktionary.org