One of the mysteries of the English language finally explained.
1Characterized by or exhibiting harmony or balance; aptly arranged or adjusted; finely tuned.
2Of an instrument, the voice, etc.: tuned to a high pitch; high-pitched.
3Originally and chiefly US. Characterized by or exhibiting tension, nervousness, or (excessive) emotional sensitivity.
Early 17th century; earliest use found in John Florio (1553–1625), author and teacher of languages. From high + tuned.
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