catatonia
noun
cat·a·to·nia
ˌka-tə-ˈtō-nē-ə
: a psychomotor disturbance that may involve muscle rigidity, stupor or mutism, purposeless movements, negativism, echolalia, and inappropriate or unusual posturing and is associated with various medical conditions (such as schizophrenia and mood disorders)
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Merriam-Webster unabridged
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