adverb
all the more; even more; still more
Emphasizes that something is even more the case than before or than expected. Often used in formal or written contexts.
彼の説明を聞いて、なおなお混乱した。
After hearing his explanation, I became even more confused.
この問題はなおなお深刻化している。
This problem is becoming all the more serious.
Reduplication of なお (still, yet, furthermore), intensifying the meaning.