Knock
Part of speech: noun
Definition: An abrupt rapping sound, as from an impact of a hard object against wood An impact. a batsman's innings. A type of abnormal combustion occuring in spark ignition engines. Normally a flame front advances progressively out from the spark, but when knock occurs unburnt air/fuel ahead of the flame self-ignites under the heat and pressure, producing a characteristic knocking sound and a sudden further increase in pressure which can be very damaging to the engine.
Part of speech: verb
Definition: To rap one's knuckles against something, especially wood. To bump or impact. To denigrate, undervalue.
Example sentence: Don't knock the weather; nine-tenths of the people couldn't start a conversation if it didn't change once in a while.
Pink
Part of speech: verb
Definition: To decorate a piece of clothing or fabric by adding holes or by scalloping the fringe.To prick with a sword.To emit a high "pinking" noise, usually as a result of ill-set ignition timing for the fuel used (in a spark ignition engine).
Part of speech: noun
Definition: Any of various flowers in the genus Dianthus, sometimes called carnations.excellence, perfectionhunting pink; scarletA colour between red and white; pale red.One of the colour balls used in snooker with a value of 6 points.The European minnow.A young salmon.A unlettered and uncultured, but relatively prosperous, member of the middle classes; compare babbitt, bourgeoisie.A narrow boat.
Part of speech: adjective
Definition: Having a colour between red and white; pale red.Of a fox-hunter's jacket: scarlet.Having conjunctivitis.By comparison to red (communist), describing someone who sympathizes with the ideals of communism without actually being a Russian-style communist: a pinko.