also psycho-dynamic, 1856, in homeopathic publications, "pertaining to mental powers" (mesmerism, etc.), from psycho- + dynamic (adj.). By 1874 as "pertaining to psychodynamics," the science of the laws of mental action (George Henry Lewes).
word-forming element meaning "mind, mental; spirit, unconscious," from Greek combining form of psykhē "the soul, mind, spirit; life, one's life, the invisible animating principle or entity which occupies and directs the physical body; understanding, the mind (as the seat of thought), faculty of reason" (see psyche). It also was used to form compounds in Greek, such as psychapates "soul-beguiling" (with apate "deceit").
by 1812, "pertaining to mechanical forces not in equilibrium, pertaining to force producing motion" (the opposite of static), from French dynamique introduced by German mathematician Gottfried Leibnitz (1646-1716) in 1691 from Greek dynamikos "powerful," from dynamis "power," from dynasthai "to be able, to have power, be strong enough," which is of unknown origin. The figurative sense of "active, potent, effective, energetic" is from 1856 (in Emerson). Related: Dynamically.
<a href="https://www.etymonline.com/word/psychodynamic">Etymology of psychodynamic by etymonline</a>
Harper, D. (n.d.). Etymology of psychodynamic. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/psychodynamic