Arabic

bārikat-­ - to kneel (Lane 193, BK 1 116)

Formed after the active participle pattern; strangely enough, usually not quoted in comparative studies (see [DRS], [LGz]). Cf. also brk ‘s’agenouiller’ [BK 1 116]. As for bark­-, birk­- ‘genou’ quoted in [GD 153], it is not clear whether it is Daṯ. or Mhr.

PS
*bi/ark- - knee (SED I No. 39)
Cf. *rVk(u)b(­at)­ ‘knee’ (No. 232) and discussion in [GD 163], where separation of these two roots is also favored.