proper

1 proper /ˈprɑːpɚ/ adjective
1 proper
/ˈprɑːpɚ/
adjective
Britannica Dictionary definition of PROPER
1 
[more proper; most proper]
a  : correct according to social or moral rules
b  : behaving in a way that is correct according to social or moral rules
2 
always used before a noun : exactly correct
3 
always used before a noun : right or suitable for some purpose or situation
4 
always used after a noun — used to emphasize that you are referring to the specific thing that is being named
5 
always used before a noun, chiefly British : complete or absolute

proper to

formal
: belonging to or suited to (something)
2 proper /ˈprɑːpɚ/ adverb
2 proper
/ˈprɑːpɚ/
adverb
Britannica Dictionary definition of PROPER
chiefly British, informal
: in a complete way