v. 1 shake, agitate, disturb, stir, shock, jolt, jounce, bounce, jog, jerk, jiggle, joggle Don't jar the oven or the cake will collapse 2 disagree, conflict, clash, bicker, quarrel, wrangle, oppose, discord She finds that her emotions about her ex-husband are jarring 3 disturb, upset, disconcert, unsettle, disquiet, bother, trouble, vex, gall, offend, take aback, irritate, grate, irk, nettle, annoy It jars me to think that they got off with light sentences
n. 4 shock, start, jolt, surprise Seeing Sam after all those years gave me quite a jar