Meaning of zhēng:
挣
used in 掙扎|挣扎[zheng1 zha2]; to struggle to get free; to strive to acquire; to make (money)
Tā zài shuǐ zhōng bù tíng de zhēngzhá.
他在水中不停地挣扎。
He was struggling continuously in the water.
Tā zài shuǐ lǐ nǔlì de zhēngzhá.
他在水里努力地挣扎。
He struggled desperately in the water.
Tā nǔlì gōngzuò lái zhèng qián.
他努力工作来挣钱。
He works hard to earn money.
Tā měitiān nǔlì gōngzuò wèile zhèng gèng duō de qián.
他每天努力工作为了挣更多的钱。
He works hard every day to make more money.