Meanings
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1
adj
causing or tending to cause things to slip or slide
Slippery sidewalks.
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2
adj
not to be trusted
How extraordinarily slippery a liar the camera is- James Agee.
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3
adj
Of a surface, having low friction, often due to being covered in a non-viscous liquid, and therefore hard to grip, hard to stand on without falling, etc.
Oily substances render things slippery.
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4
adj
Evasive; difficult to pin down.
A slippery person.
Thesaurus
Etymology
From Middle English slipperie, an extended form ( + -y) of Middle English slipper, sliper (“slippery”), from Old English slipor (“slippery”), from Proto-Germanic *slipraz (“smooth, slippery”), equivalent to slip + -er. Compare also Middle English slibbri, slubbri (“slippery”) borrowed from Middle Dutch or Middle Low German slibberich (“slippery”). Cognate with German schlüpfrig (“slippery”), Danish slibrig (“slippery”), Swedish slipprig (“slippery”).