Psychotic

wiktionary

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Derived in English from psychosis +‎ -otic; compare French psychotique, German psychotisch. Attested from the late 19th century. Compare earlier neurotic.

etymonline

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psychotic (adj.)

"of or pertaining to psychosis," 1889, coined from psychosis, on the model of neurotic/neurosis; ultimately from Greek psykhē "understanding, the mind (as the seat of thought), faculty of reason" (see psyche). Related: Psychotically.

psychotic (n.)

"a psychotic person," 1901, from psychotic (adj.).