Jar, v. i. [imp. & p. p.Jarred (?); p. pr. & vb. n.Jarring (?).] [Cf. OE. charken to creak, AS. cearcian to gnash, F. jars a gander, L. garrire to chatter, prate, OHG. kerran to chatter, croak, G. quarren to grumble, and E. jargon, ajar.]
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.