One of the mysteries of the English language finally explained.
1A candle of little power made by dipping the pith of a rush in tallow or some other grease.
2Figurative and in figurative contexts. Something weak, feeble, or insignificant.
Mid 16th century; earliest use found in William Salesbury (d. c1580), translator and humanist scholar. From rush + candle.
rush candle/ˈrʌʃ ˌkandl/
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