Impartially? Not very (6)
I believe the answer is:
fairly
This might be a double definition.
'impartially?' is the first definition.
(thesaurus)
'not very' is the second definition.
'fairly' can be an answer for 'very' (thesaurus). I am not sure about the 'not' bit.
Can you help me to learn more?
(Other definitions for fairly that I've seen before include "Justly, without favouring one party" , "Evenhandedly" , "To a moderate degree" , "Equitably; passably" , "Moderately" .)