This is the 12126th most frequent Korean word.
눈도
"눈도" means "eyes also" or "snow also," depending on context.
Here, '눈도' implies 'also snow,' emphasizing 'snow' in addition to cold or other conditions.
눈도 많이 내리고 춥네요.
It's snowing a lot, and it's cold.
In this example, '눈도' indicates 'also eyes,' suggesting that the eyes of the person are beautiful in addition to other features.
그 사람은 눈도 예뻐요.
That person has beautiful eyes, too.
Here, '눈도' is used to stress the eyes as part of the difficulty caused by fatigue, through the phrase 'not even open one's eyes.'