regret

[Unregistered]

I always see regret with an s

I have no regrets

isn't regret uncountable. It's a feeling.

It's possible to say " I have no regret" too.

and the noun after "no" should that always be singular or plural?

[engee30]

It's possible to say " I have no regret" too.

I don't think it's possible to say have no regret instead of have no regrets. I guess it's a matter of stylistics, or semantics.

[Casiopea]

In addition, both have no regrets and have no regret are possible. The former refers to more than one regret, whereas the latter refers to a specific regret:

1. Robert Brault quote - Today I bent the truth to be kind, and I have no regret, for I am far surer of what is kind than I am of what is true.

2. I have no regret leaving law for shoe making.

3. Normally I would not reveal so much about a film in case readers may be planning to see it, but in this case I have no regret in doing so.

In short, the noun regret is countable; e.g., I have one regret; I have many regrets.

Does that help?