The interrelation of conscious and unconscious processes and emotions that determine personality and motivation WordNet 3.0 & Open English WordNet

Psychodynamics, also known as psychodynamic psychology, in its broadest sense, is an approach to psychology that emphasizes systematic study of the psychological forces underlying human behavior, feelings, and emotions and how they might relate to early experience. Wikipedia

The study of psychological forces driving human behavior Wikipedia Disambiguation

Approach to psychology Wikidata

The dynamic interplay between forces that govern human behaviour. Wiktionary

Interplay. Wiktionary (translation)