To Bite The Bullet
Aguantar vara
Meaning:
We bite the bullet so as to prepare ourselves for an unpleasant experience. We brace ourselves to courageously endure a painful situation.
Origin:
In the 19th century, when a soldier had to be operated by doctors without any anesthetics, he was given a bullet to bite so as to tolerate the pain. Biting the soft lead of the bullet let the soldier withstand the pain. It prevented the soldier form screaming.

Bite the Bullet, click on the image to watch the trailer of the movie, «Bite the Bullet» with Gener Hackman
Example:
• My boss organized a party one week before announcing the next cost reduction project. This plan includes to lay off tens of workers. The party was nice and everybody enjoyed it. Even though, we knew some of us would not work for the company any more, the party really helped us to bite the bullet.
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