Origin: 1640–50; in- 2 + obs.
vigorate invigorated;
see vigor, -ate 1 
Related forms: in⋅vig⋅or⋅at⋅ing⋅ly, adverb
in⋅vig⋅or⋅a⋅tion, noun
in⋅vig⋅or⋅a⋅tive, adjective
in⋅vig⋅or⋅a⋅tive⋅ly, adverb
in⋅vig⋅or⋅a⋅tor, noun
Synonyms:strengthen, vitalize.
See animate. 
[in-vig-uh-reyt] 