The Barddas of Iolo Morganwg, Vol. I., ed. by J. Williams Ab Ithel, , at sacred-texts.com
There are three primordial elements, from which proceed every material, and speciality of existence: calas; fluidity; and nwyvre.
Thus, after another mode, according to some ancient teachers:--There are five primordial elements: calas; fluidity; breath, that is, air and wind; uvel, that is, fire and light; and nwyvre, that is, life and motion. Every motion takes place by the agitation of nwyvre; it is in and within animate beings, and around and without inanimate beings.