Reconstructions

PWS
*btr - to cut off (DRS 90, Kogan 2015: 454)
PWS
*btk - to cut (EDA B 125)
PWS
*bwḥ - to be powerful, to have authority (EDA 115)
PWS
*byn - to (be) separate(d) (DRS 62; Kogan 2015: 80)
the priority of the verbal root over the nominal formation *bayn- (Lipiński 1997:468) rather than vice versa remains to be substantiated (cf. Blažek 2007:32)
PWS
*bayna - between (Arakelova 2001:45, Kogan 2015: 80)
An eventual relationship between the preposition *bayna and the PWS verbal root *byn ‘to (be) separate(d)’ (DRS 62) is not in doubt (Kogan 2015: 80)
PWS
*bzγ - to tear (EDA I 413)
PWS
*bzw - to disgrace, to oppress (EDA I 413)
PWS
*dbḳ - to adhere, to stick to each other (EDA II)

Thought to be related, as a variant root, to PWS *ṭbḳ with a similar scope of meanings.

PWS
*dkk - to smash, to crush (EDA II)

Originally a biconsonantal element, which in WS is also attested as *dwk and *dky. See also Akk. dâku 'to kilľ.

PWS
*dḳdḳ - to pound; to be fine, small

A variant root of *dḳḳ attested in WS in both transitive and intransitive (adjectival) verbs as well as in derived nouns.