давс • (davs) (Mongolian spelling ᠳᠠᠪᠣᠰᠣ)
From Proto-Mongolic *dabu-su. Compare Kalmyk давсн (davsn) and Buryat дабһан (dabhan).
Also possibly related to Proto-Turkic *dūŕ (“salt”) (cf. Chuvash тӑвар (tăvar), Yakut туус (tuus), Turkish tuz), and Evenki турукэ (turuke).