Etymology

From sonda, from Middle French sonde ‎(“sounding line”), from Old French sonde ‎(“sounding line”), from Old English sund- ‎(“sounding”), as in sundġierd ‎(“sounding-rod”), sundlīne ‎(“sounding-line, lead”), sundrāp ‎(“sounding-rope, lead”), from sund ‎(“ocean, sea”), from Proto-Germanic *sundą ‎(“a swim, body of water, sound”), from Proto-Indo-European *swem(bh)- ‎(“to be unsteady, swim”). Cognate with Old Norse sund ‎(“swimming; strait, sound”). More at sound.

Pronunciation

• IPA^(key): /sundəˈʒa/