Firmly against (4)
I believe the answer is:
anti
(Other definitions for anti that I've seen before include "One who is against (something)" , "Person opposed" , "Opposition member" , "Policy's opponent" , "(Person who is) not in favour" .)
I believe the answer is:
anti
(Other definitions for anti that I've seen before include "One who is against (something)" , "Person opposed" , "Opposition member" , "Policy's opponent" , "(Person who is) not in favour" .)