Answer: schizo

AnswerCrossword Clue
SCHIZO

Wildly eccentric, briefly

SCHIZO

Shrink's study

SCHIZO

Psych ward patient, maybe

SCHIZO
Split: Prefix
SCHIZO
Word element denoting division.
SCHIZOSplit: Comb. form
SCHIZOUnstable person, slangily
SCHIZOMentally unstable, in a way
SCHIZONuts informally
SCHIZOOne with a split personality, slangily
SCHIZOMentally unstable, slangily