adverb

1. In a sad manner; sorrowfully.

   ““Only when we climb up can we see it,” he said sadly.”

2. Unfortunately, sad to say.

   “If you think you’re getting out of this place alive, you are sadly mistaken, my friend.”

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

Synonyms: mournfully, regretfully, ruefully, sorrowfully, alas, regretfully, regrettably, sad to say