v. & n.
v. (jarred, jarring) 1 intr. (often foll. by on) (of sound, words, manner, etc.) sound discordant or grating (on the nerves etc.). 2 a tr. (foll. by against, on) strike or cause to strike with vibration or a grating sound. b intr. (of a body affected) vibrate gratingly. 3 tr. send a shock through (a part of the body) (the fall jarred his neck). 4 intr. (often foll. by with) (of an opinion, fact, etc.) be at variance; be in conflict or in dispute.
n. 1 a jarring sound or sensation. 2 a physical shock or jolt. 3 lack of harmony; disagreement.
[ 16th c.: prob. imit. ]