márman n. (√ mṛ) mortal spot, vulnerable point, any open or exposed or weak or sensitive part of the body (in [Nir.] reckoned to be 107), [RV.] &c. &c.
the joint of a limb, any joint or articulation, [ib.]
the core of anything, the quick, [ib.]
any vital member or organ (cf. antar-m°)
anything which requires to be kept concealed, secret quality, hidden meaning, any secret or mystery, [MBh.]; [Kāv.] &c.