Emily Dickinson Lexicon

jar, n. [Fr. < Arabic jarrah, earthen water vessel.] (webplay: earth, glass, open).

1. Buzz; discord; inharmonious sound; repetitive vibrating noise; [word play; see a jar, adv. and ajar, adv.; see also OED def. 2a., 1848 L. Hunt “A Jar of Honey from Mount Hybla.”]
2. Vessel; vase; jug; bottle; cylindrical watertight container made of earthenware, stoneware, or glass.