逞强 (chěng qiáng): 誇示するために

Even though he couldn't swim, he insisted on showing off in front of his friends, and as soon as he got into the water, he panicked.

The doctor advised her to rest more, but she didn't want to show off in front of her colleagues and forced herself to go to work, and as a result her condition worsened.

When moving the furniture, he could have asked for help, but he insisted on showing off by himself, carrying the heavy cabinet alone and nearly straining his back.

While hiking in the wild, he felt exhausted, but he didn't want to show off in front of his teammates, so he promptly spoke up about his condition and avoided danger.