Inherited from Proto-Mongolic *kalbuga, perhaps an ancient borrowing from Proto-Turkic *kaĺuk or otherwise related.
Compare Daur xalbeg (“hoe blade”), Turkish kaşık.
халбага • (halbaga) (Uyghurjin spelling ᠬᠠᠯᠪᠠᠭᠠ (qalbaɣ-a))