(Idafa). Correlations or relationships. The Divine Names demand relationships because the Divine Names are what make the cosmos manifest. The Powerful (Al Qadir) demands the object of power (Maqdur). The Merciful (Ar Rahman) demands an object of mercy (Marhum). The Lord (Rabb) demands a vassal (Marbub).
('Abd). The slave (and worshipper) is the one who is in a state of total and utter submission to the Will of Allah. After having been annihilated in Allah where all duality vanished and distinctions were erased, he returns to creation with perfect courtesy and with the Truth of Certainty that 'the Lord is the Lord and the slave is the slave'. When 'abd is translated as 'servant' it carries the implication that the servant can leave the service of his Master, if he so desires. However, the 'slave' is in total bondage, being utterly dependent upon his Master. All buying and selling transactions have been terminated. The slave belongs to Allah, completely, perfectly and unconditionally.
(Mustanad). Support (or reality) of a thing. Everything in the cosmos can be traced back to the Divine Names. The support or reality of each existent thing is a Divine Name. Therefore, all things have a support within the Divine Knowledge. We are all supported by Allah.