Base aim (4)
I believe the answer is:
mean
I believe this is a double definition.
'base' is the first definition.
('mean' can be a synonym of 'base')
'aim' is the second definition.
(I've seen this before)
(Other definitions for mean that I've seen before include "Relating to flowers" , "cause" , "very good" , "Name for being stingy" , "Being near" .)