I REGRET to say he did not honor me
with his patronage.
Game of Thrones Season 1, Episode 4
Oh, I'm so sure I'm gonna REGRET this,
but who was I with?
The Big Bang Theory Season 4, Episode 6
No, I meant that
as a REGRET.
The Big Bang Theory Season 7, Episode 22
And now I REGRET it.
The Big Bang Theory Season 11, Episode 17
My greatest REGRET is that
Oberyn died fighting for you.
Game of Thrones Season 7, Episode 2