Quiz: Remember the definition of mal de mer?
c.1300, jangeln, "to talk excessively, chatter, talk idly," from Old French jangler "to chatter, gossip, bawl, argue noisily" (12c.), perhaps from Frankish *jangelon "to jeer" or some other Germanic source (cf. Middle Dutch jangelen "to whine"). Meaning "make harsh noise" is first recorded late 15c. Related: Jangled; jangling.
late 13c., "gossip, slanderous conversation, dispute," from Old French jangle, from jangler (see jangle (v.)). Meaning "discordant sound" is from 1795.