Reconstructions

PS
*bṭl - to be invalid, lost, to stop working (EDA B 131)
PS
*bwṯ - to be ashamed (EDA B N6)
PS
*bay(a)n- - (type of a tree) (Kogan 2012: 238)
PS
*dubb- - bear (SED II No. 65; Kogan 2011: 208)

Level?

PS
*dād- - paternal uncle (Kogan 2014: 93)

An eventual relationship with Akk. dādu ‘love-making; object of love, darling, favorite’, Hbr. dōd ‘beloved; love’ is also conceivable

PS
*dād-at- - paternal aunt (Kogan 2014: 93)
PS
*dhm - to be dark (Fronzaroli 1965a: 138–139, 145, 149; Kogan 2011: 196)
PS
*dam- - blood (SED I No. 50)
PS
*dardar- - thistle (Fronzaroli 1969a: 276, 289, 299; Kogan 2011: 201; Kogan 2012: 234)
PS
*daṯˀ- - grass; herb; spring (Fronzaroli 1965a: 142, 148, 150, Fronzaroli 1968: 275; Fronzaroli 1969a: 275, 289, 299; Kogan 2011: 200; Kogan 2012: 231)