against

against /əˈgɛnst/ preposition
against
/əˈgɛnst/
preposition
Britannica Dictionary definition of AGAINST
1 
a  : in opposition to (someone or something)
b  : in competition with (someone or something)
2 
— used to indicate the person or thing that is affected or harmed by something
3 
: not agreeing with or allowed by (something, such as a law)
4 
a  : not helping or favoring (someone)
b  : as a reason for disliking (someone or something)
5 
— used to say that one thing is being compared with another
6 
a  : as a defense or protection from (something)
b  : in preparation for (something)
7 
— used to describe hitting or touching something or someone
8 
: in a direction opposite to the movement of (something)
9 
: with the background of (something)
10 
: as a charge on (something)

as against

— see 2as

over against

— see 2over

up against

— see 2up