From vi- plus the Sanskrit root añj, together vyañj. This means to manifest, or to be available for objectification (Svāmī Dayānanda, Home Studies Volume 7, page 127).
Interesting that another meaning according to the Dhātupāṭha is also ‘desire or wishes’. The wheel of appearance and manifestation is maintained and tempted by a seemingly eternal desire. What is available for objectification is available for experience. It is maintained by ignorance, and by ignorance it is experienced as real.
Extended definition:
- vyakti
Manifestation. Everything that is visible was already potentially present in consciousness, through the upādhi māyā. One way to interpret it: Māyā is the potential force, īśvara de vyakti, the manifestation of objects.