婉言谢绝的英文：
[Literal Meaning]
euphemistic/words/thank/refuse
to refuse in a thankful euphemistic way

[解释]
用委婉的言语表示拒绝并感谢。

[Explanation]
to decline with gratitude

[例子]
这个中年男子想邀请小丽去吃饭，但被她婉言谢绝了。

[Example]
The middle-aged man wanted to invite Xiao Li to dinner, but she declined with gratitude.

refuse(an offer)tactfully and mildly;Refuse politely
婉言谢绝

She phrased her refusal politely.
她婉言谢绝了。

He graciously declined all the visits.
他婉言谢绝了一切来访。

No, thank you.
不，谢谢(您)(表示婉言谢绝)。