Within the depth-psychology corpus, ‘material’ operates across at least four distinct registers that are simultaneously in tension and in dialogue. In its most concrete alchemical deployment — dominant in Jung, von Franz, Edinger, and Abraham — material denotes the prima materia: the undifferentiated, chaotic, hermaphroditic substrate from which transformation proceeds, carrying within itself both the darkness of nigredo and the seed of the philosopher’s stone. Here matter is not inert but animated, the site of projected unconscious content and the locus of a sleeping divinity awaiting liberation. A second register emerges in clinical and methodological usage — in Jung, Freud, Romanyshyn, and the IFS tradition — where ‘material’ signifies the raw psychic data furnished by dreams, fantasies, active imagination, and somatic life: the empirical substrate the analyst must not violate with preconceptions. A third register, prominent in Sardello, von Franz, and Aristotle, concerns the philosophical relationship between matter and form, and the question whether the material world itself carries soul. A fourth, visible in quantum-psychological discourse (Ponte and Schäfer), asks whether psychic and physical matter share a single reality viewed from different angles. Across all these registers, the term marks the irreducible ground — that which must be encountered before transformation, interpretation, or transcendence can occur.