peer in English:

I feel below par.

About ​half the ​teachers are good, and the ​rest are ​clearly below par.

Golf sub- par, but don't breathe sub-...

His command of English is on a par with mine.

Some analysts consider Somalia as the failed state par excellence.

Some think that a belief in Santa Claus is on a par with belief in God.

This guarantees me par.

I'm on a par with him in mental faculties.

That's par for the course with teenagers.