Energy, spirit (3)
I believe the answer is:
vim
I believe this is a double definition.
'energy' is the first definition.
(synonyms)
'spirit' is the second definition.
(vim is a kind of spirit)
(Other definitions for vim that I've seen before include "Energy, enthusiasm" , "Informal energy or drive" , "Exuberant vigour" , "Pep and energy" , "Energy and vigour" .)