In a tidy, orderly, or skillfully done manner; precisely and efficiently.
From Old French 'net' meaning 'clean, pure,' ultimately from Latin 'nitidus' meaning 'shining, bright.' The English word evolved through Middle English 'nete' to mean 'clean, pure,' then extended to mean 'orderly' and 'skillfully done.' The adverbial form developed in the 15th century.
The word's evolution from 'shining' to 'orderly' reflects a deep human connection between cleanliness and moral goodness - we still say someone 'polished' their skills or gave a 'clean' performance. Psychologically, people who arrange things 'neatly' often feel more in control of their environment and emotions.
Complete word intelligence in one call. Free tier — 50 lookups/day.