Meaning of bù zhī:
bù zhī
不知
Verb
not to know; unaware; fig. not to admit (defeat, hardships, tiredness etc)
Tā bùzhī rúhé jiějué zhège wèntí.
他不知如何解决这个问题。
He does not know how to solve this problem.
Tā duì zhè jiàn shì wánquán bùzhī qíng.
他对这件事完全不知情。
He is completely unaware of this matter.
Tā duì kùnnán bùzhī tuìsuō.
他对困难不知退缩。
He does not admit defeat in the face of difficulties.
Adverb
unknowingly
Tā bù xiǎoxīn hē le yī bēi fàng jiǔ de shuǐ, bùzhī zhè shuǐ yǐjīng bùnéng hē le.
他不小心喝下了一杯放久的水，不知这水已经不能喝了。
He unknowingly drank a glass of water that had been left out for a long time, not knowing it was no longer drinkable.
