Having or showing a lot of ability and expertise at doing something well.
From 'skill' (from Old Norse 'skil' meaning 'distinction' or 'knowledge') plus '-ful' meaning 'full of.' The British spelling is 'skilful,' while American English uses 'skillful' with double 'l'.
Interestingly, brain imaging shows that skilful experts literally see problems differently than beginners—their brains have reorganized connections so they recognize patterns instantly, which is why experts make complicated things look effortless!
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