Upādhi (Sanskrit: उपाधि ) is a term in Hindu philosophy meaning "imposition" or "limitation".
To restrict the too general middle term here, 'damp fuel' should be added as the condition of smoky fire.
It can also be viewed as a disguise or vehicle for true reality, both defining something and limiting it.
[2] Comans says the word upādhi is the most important technical expression in Advaita Vedanta.
[3] In his commentary on the Bṛhadāraṇyaka Upaniṣhad 3.8.12, Śaṅkara raises the important question as to what is the difference between Brahman, God (Īśvara), and the individual self (jīva) and he answers the question by saying that these distinctions are made only on the basis of limiting adjuncts (upādhi), which prevents reality.