take the wind out of someone's sails englanniksi - Sanakirja.org (englanti-englanti)

(idiomatic) To discourage someone greatly; to cause someone to lose hope or the will to continue; to thwart someone.

"I tell you Van Bahr Lamb is a fool." . ..
But Polly . . . completely took the wind out of her sails, by coolly remarking,— "I like fools."
Could he have some elderly idea of wanting a youngster for a wife? Occasionally an old chap did. Serve him right if some young chap took the wind out of his sails.
[T]he Republicans . . . have been repeatedly battered in the polls since German unification became a mainstream German concern and took the wind out of their sails.
"It took the wind out of our sails," he says. "I had no Plan B. I was a wreck."