Emily Dickinson Lexicon

JAR, v.i.

1. To strike together with a short rattle or tremulous sound; to strike untunably or harshly; to strike discordantly; as, a jarring sound. A string may jar in the best master's band. – Roscommon.
2. To clash; to interfere; to act in opposition; to be inconsistent. For orders and degrees / Jar not with liberty, but well consist. – Milton.
3. To quarrel; to dispute; to clash in words. – Dryden.
4. To vibrate regularly; to repeat the same sound. – Shak.