知彼知己，百战不殆
knowing the enemy and yourself will get you unscathed through a hundred battles (idiom, from Sunzi's "The Art of War")
Traditional: 知彼知己，百戰不殆
✍️ Practice Writing the Full Phrase
📖 Additional Information
English Phonetic:
'nәuiŋ
Detailed Definition:
n. a clear and certain mental apprehension\ns. evidencing the possession of inside information\ns. highly educated; having extensive information or understanding