## testify ##

"declare" or "serve as a witness"

## to every man who is circumcised ##

"to every person who has become a Jew." Paul is using circumcision as a mmetonym for being Jewish. (See: [[rc://en/ta/man/translate/figs-metonymy]])

## obliged ##

"bound" or "constrained" or "enslaved"

## to do ##

"to obey"

## You are alienated from Christ ##

"You have ended your relationship with Christ"

## seek to be justified by the law ##

"look for ways to have God declare you good by obeying the law." The law is metonymy for Judaism.

## you have fallen away from grace ##

Paul is comparing a person who decides that he does not need or want the grace of Christ to someone who falls from a good high place to a bad lower place. (See: [[rc://en/ta/man/translate/figs-metaphor]])