A subtle form of physical phenomenon, asserted only by the Vaibhashika and Gelug Prasangika schools, that is caused by a strong constructive or destructive motivation, but which does not show ("reveal") that motivation. Such a phenomenon is part of a mental continuum, but is not felt on that continuum; it does not degenerate from moment to moment; it can only be an object of mental cognition; and it must be either constructive or destructive. Examples are vows and one aspect of karmic impulses.
Tibetan: rnam-par rig-byed ma-yin-pa'i gzugs
J Hopkins: non-revelatory form.