regretfully /rɪˈgrɛtfəli/ adverb Learner's definition of REGRETFULLY
[more regretfully; most regretfully]
1
: with regret : with sadness or disappointment后悔地;遗憾地;令人失望地 -
“I must leave now,” he said regretfully.“我现在必须得离开。”他遗憾地说。
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I must regretfully decline your invitation.很遗憾,我必须谢绝你的邀请。
2
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used to say that something is regretted遗憾的是;令人失望的是