means The deep, seasoned judgment that comes from experience — not just knowing things, but knowing what to do with what you know.

from From Old English wīsdōm, built from wīs ('wise') plus the suffix -dōm, which marked a state or condition (the same -dom we still hang on 'freedom' and 'kingdom'). The wīs root traces back to a Proto-Germanic ancestor tied to ideas of seeing and knowing — a cousin to 'wit' and 'vision' — pointing to an old intuition that to be wise is, in some sense, to see clearly.