Designed or made so that it does not drip; free from dripping or preventing drips.
From English 'drip' (of uncertain origin, possibly imitative) + '-less' (meaning 'without'), describing something engineered not to drip.
Dripless is especially common in product marketing—dripless candles, dripless faucets, dripless paint—showing how companies use the '-less' suffix to highlight desirable absence of mess.
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