废寝忘食 (fèi qǐn wàng shí): To neglect sleep and forget about food [idiom] — Meaning & Stroke Order

In order to finish this project, he has often been working so hard lately that he neglects sleep and forgets to eat.

He has recently become obsessed with programming and codes day and night, neglecting sleep and food.

In order to overcome this technical challenge, the entire team worked tirelessly, neglecting sleep and food, for three months.

In order to complete this project, she has been working so hard that she forgets to eat and sleep these past few days.

Is it really necessary to work so hard, neglecting sleep and food, just to pursue perfection?

Although he works very hard, he has not neglected sleep and food to the point of disregarding his health.

The scientist worked tirelessly, forgetting to eat and sleep, and finally made a major breakthrough.

He not only studied diligently, neglecting sleep and food, for the exam but also found time to tutor other classmates.