PCS

*ma-rpiḳ- - elbow (SED I No. 189)

A secondary deverbal root formation on the C. Sem. level. Related to Sem. *rpḳ ‘to lean, recline (on one’s elbow)’. 

Hebrew
marpēḳ - elbow (Jastrow 846)

pB. 

Jewish Babylonian Aramaic
marpəḳā - elbow (Jastrow 846)
Arabic
marfiq-, mirfaq- - elbow (Lane 1127)