Semitic Etymological Database
Probably related to Akk. šuparzuḫu ‘to make abundant, to provide abundantly’, Arb. bḏḫ ‘to be high, lofty; to be proud, haughty’.
The connection of the root as well as its ESA and MSA cognates (Sab. mdlt, SD 36, Soq. déle, LS 128) to PS *dlw is questionable