Mistake
Error
noun
さくご
失敗 （しっぱい） Failure, Mistake
間違い （まちがい） A Mistake, Mistake
誤り （あやまり） Mistake, Error, Slip, Bug, Fault
錯誤 （さくご） Mistake, Error
It was a Mistake to tell him he sucks さく at Go ご (asian chess).
He realized it was a Mistake to suck さく on golf ご balls.