"as an permanent covenant." Because it was marked in flesh, it could not easily be erased.
## uncircumcised male who is not circumcised in the flesh of his foreskin ##
The word "uncircumcised" and the phrase following "male" mean the same thing. Hebrew often says the same thing twice. Translators will have to decide whether they can do that in their language.
## will be cut off from his people ##
This means either "will be separated from his people" or "will be destroyed from among his people."