to work very hard to achieve something
何かを達成するために一生懸命働く (nanika o tassei suru tame ni isshōkenmei hataraku)
"He’s been breaking his back to support his family."
"彼は家族を支えるために背中を壊している。" (Kare wa kazoku o sasaeru tame ni **senaka o kowashite iru**.)
to act in a manipulative or strategic way to gain advantage
to suffer the consequences of one’s actions
it’s better to do something late than not do it at all
to stay mentally focused and motivated
to demonstrate leadership qualities or skills
to cry very hard due to sadness