Shivam. A Sanskrit word whose essential meaning can only be approached by existing words in the English language in a manner akin to that of a mathematical limit being approached by evaluation techniques; as with infinity, this limit is never reached, but understanding can be acquired on that value nonetheless.
A colorful illustration of the concept of shivam exists in the Mahamrityunjaya Mantra:
ॐ त्र्यम्बकं यजामहे सुगन्धिं पुष्टिवर्धनम् ।उर्वारुकमिव बन्धनान् मृत्योर्मुक्षीय मामृतात् ।।
oṁ tryambakaṁ yajāmahe sugandhiṁ puṣṭi-vardhanaṁurvārukam-iva bandhanān mṛtyormukṣīya māmṛtāt
OM We worship Shiva, the Three-eyed Lord who is fragrant and who nourishes and nurtures all beings. As is the ripened cucumber freed from its bondage, may He liberate us from death for the sake of immortality.
….At the exact moment of ripeness on the vine the fruit, being suspended in space time in complete equilibrium of forces, tumbles effortless to the ground. This is the nature of existence, and that consciousness is shivam.