speed bump

speed bump

noun
a rounded ridge built crosswise into the pavement of a road or driveway to force vehicles to slow down.

Origin:
1970–75
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Speed bump is always a great word to know.
So is quincunx. Does it mean:
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
a fool or simpleton; ninny.
WordNet
speed bump

noun
a hindrance to speeding created by a crosswise ridge in the surface of a roadway 
WordNet® 3.0, © 2006 by Princeton University.
Cite This Source
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