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Etymology · Proto-Indo-European

*slewbʰ-

3 English words descend from Proto-Indo-European *slewbʰ-, most common first.

slipTo lose one’s traction on a slippery surface; to slide due to a lack of friction.
lubricateTo make slippery or smooth (normally to minimize friction) by applying a lubricant.
aslopeSlanted, sloping.