re‧gret‧ful‧ly /rɪˈɡretfəli/ adverb
[Word Family: adverb: regrettably, regretfully; adjective: regrettable, regretful; verb: regret; noun: regret]

1. feeling sad because you do not want to do what you are doing:
‘I must go,’ he said regretfully.

2. [sentence adverb] formal used to talk about a situation that you wish was different or that you are sorry about Synonym : regrettably:
Regretfully, we do not have time to continue this discussion now.

[TahlilGaran] Dictionary of Contemporary English ▲