"one who wastes candles," specifically a contemptuous word for one who follows occupations considered unprofitable or harmful, 1590s, from candle + agent noun from waste (v.).
A whoreson book-worm, a candle-waster. [Ben Jonson, "Cynthia's Revels"]
candied
candle
candle-light
Candlemas
candlestick
candle-waster
can-do
candor
candour
candy
candyass
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