noun
also aca·thi·sia ˌākaˈthizh(ē)ə, ˌa-, -ēzh-
( -s )
Etymology: New Latin, from Czech akathisie , from a- a- (II) + Greek kathisis sitting (from kathizein to sit down) + Czech -ie -ia (I) — more at kathisma
: a condition characterized by uncontrollable motor restlessness