Jar, v. i.  [imp. & p. p. Jarred p. pr. & vb. n. Jarring ]
  1.  To  give forth a rudely quivering or tremulous sound; to sound harshly or discordantly; as, the notes jarred on my ears.
     When such strings jar, what hope of harmony ?   --Shak.
     A string may jar in the best master's hand.   --Roscommon.
  2.  To act in opposition or disagreement; to clash; to interfere; to quarrel; to dispute.
  When those renowned noble peers Greece
  Through stubborn pride among themselves did jar.   --Spenser.
  For orders and degrees
  Jar not with liberty, but well consist.   --Milton.
  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: jarful]
       3: a sudden impact; "the door closed with a jolt" [syn: jolt,
           jounce]
       v 1: be incompatible; be or come into conflict; "These colors
            clash" [syn: clash, collide]
       2: move or cause to move with a sudden jerky motion [syn: jolt]
       3: shock physically; "Georgia was shaken up in the Tech game"
          [syn: shake up, bump around]
       4: affect in a disagreeable way; "This play jarred the
          audience"
       5: place in a cylindrical vessel; "jar the jam"
       [also: jarring, jarred]