A loanword from Iranian, cf. Parthian bylwr “rock crystal” (Henning 1937, 81), Middle Persian bēlūr ‘crystal’
(Pahlavi 18) and see further Ciancaglini 2008, 128 f. and Beekes 212 where an eventual Indo-Aryan (and, ultimately,
Dravidian) etymology is discussed.
Akkadian
daˀāmu - to be(come) dark, dim
(CAD D 1, AHw. 146)
daˀmu ‘dark’ (CAD D 74, AHw. 158)
Akkadian
daˀāpu - to push, to knock down
(AHw 146, CAD D 1)
Attested in a few SB literary texts and lexical lists, in earlier periods in proper names only. Cf. further Landsberger 1934: 82-3, Salonen 1976: 194-5. Geminated -b- i n da-ab-bu (Malku V 50) is probably due to a WS influence.
The term belongs to the “Amorite” system of kin designations and is attested mainly in Mari corpus; Akkadian proper employs analytical expressions to designate uncle and aunt, e.g. aḫi abim, aḫāt abim and so on.
Akkadian
dādu - love-making; object of love, darling, favorite
(CAD D 20, AHw. 149)