enervate (verb: EN-uhr-vayt, adj.: i-NUHR-vit)
verb transitive: to deprive of strength or vitality.
adjective: deprived of strength; weakened.
From Latin enervare (to weaken), from ex- (out) + nervus (sinew). Earliest documented use: 1603
Usage (from Wordsmith)
“Dan Perjovschi has seen how rule by fear can twist and enervate a society.”
R.C. Baker; Best in Show; The Village Voice (New York); Aug 8, 2007.