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.
Arabic
bark- - skin of the belly of the camel and of the portion of the breast next to it; male breast
(BK 1 116, Lane 193)
The additional meaning related to kneeling appears to be due to contamination with *bi/ark ‘knee’.