From WordNet (r) 3.0 (2006):
jar
n 1: a vessel (usually cylindrical) with a wide mouth and
without handles
2: the quantity contained in a jar; "he drank a jar of beer"
[syn: jar, jarful]
3: a sudden jarring impact; "the door closed with a jolt"; "all
the jars and jolts were smoothed out by the shock absorbers"
[syn: jolt, jar, jounce, shock]
v 1: be incompatible; be or come into conflict; "These colors
clash" [syn: clash, jar, collide]
2: move or cause to move with a sudden jerky motion [syn:
jolt, jar]
3: shock physically; "Georgia was shaken up in the Tech game"
[syn: jar, shake up, bump around]
4: affect in a disagreeable way; "This play jarred the audience"
5: place in a cylindrical vessel; "jar the jam"