باطن

bāt̤in (act. part. of بطن , 'to penetrate or enter into'), adj. & s.m. Unapparent, hidden, concealed, covert, inward, inner, interior, internal, intrinsic, esoteric (opp. of z̤āhir);—the internal or intrinsic state, character or circumstances (of a man or a thing); the inward part; the secret thoughts; mind, heart; disposition of the mind; recesses of the mind.