Reconstructions

PWS
*ku/aˁ(-at)- - joint; ankle; foot (SED I No. 140)
PWS
*kb - to be curved, bent; to make a circular movement; to encircle (Kogan 2015: 443)
possibly also: JPA kwb - pitcher; pB Heb kabkāb/kapkāp - an arched round vessel; Akk kabābu - shield
PWS
*kd - to tread, to walk slowly (?) (Kogan 2015: 462)
The biconsonantal root is most prominantly represented by PES *kyd.
PWS
*khl - to be able (Kogan 2015: 86)
See also PNWS *ykl with the same meaning
PWS
*kry - to dig (Kogan 2015: 118)
PWS
*ksw - to cover (HALOT 487, DUL 461)
PWS
*ktb - to sting, to carve (Kogan 2015: 213)
PWS
*ḳVbl - before, in front of, opposite to (Arakelova 2001:47)
This preposition is considered to be derived from *ḳbl ‘to be in front of; to accept, to receive’.
PWS
*kwn - to be (Kogan 2015: 86)
Akk. kânu ‘to be firm in place, to remain stationary, to be reliable, correct’ provides a suitable source of semantic development
PWS
*ḳˁr - to be deep, concave; to make a hollow (HALOT 1116)