PWS

*rVk(u)b(-­at)­- - knee (SED I No. 232)

Metathetic of *birk- ‘knee’

Biblical Aramaic
ˀarkubbāṯēh - (du. suff. 3 ms) knee (HALOT 1825)
Jewish Palestinian Aramaic
ˀrkwbth - knee (DJPA 7)
Jewish Palestinian Aramaic
ˀarkubbā - knee (DJPA 75)
det. ˀarkubtā
Christian Palestinian Aramaic
ˀrkwbˀ, det. ˀrkwbtˀ - knee (DCPA 29)
Samaritan
ˀrkwbyn (du. pl.) - knee (DSA 834)
Syriac
ríkbe - knee (Maˁṣarānī-Segal 230)

dial.

Maalula
rḫoppṯā - Knie (GNDM 76)
Arabic
rukbat- - knee (Lane 1143)
Geez
rākub - shoulder blade (CDG 469)
Tigre
märkäb - shoulder-joint (WTS 157)