psyche
/ˈsaɪki/·사이키·noun
the human soul, mind, or spirit
GreekCEFR C1
Root
Greek 'psyche' (soul, breath of life)
Greek psyche (soul, breath) → Latin psyche → English psyche (17th c., revived in modern psychology by Freud and Jung)
In a word
Greek psyche = 'breath, soul'. In Greek myth, Psyche is the personification of the soul as a goddess. The psych family turned 'the inside of mind' into disciplines — psyche (the mind itself), psychic (of the mind), psychology (the study of the mind), psychiatry (its medicine), psychoanalysis (its dissection). Freud and Jung pulled this Greek word back into the 20th century, dragging the inside of the human being into the territory of scholarship.
Examples
The event scarred the national psyche.
Jung explored the collective psyche.
Stress affects the psyche.
Related
psychicpsychologypsychiatrypsychoanalysispsychotic