Translation of possum in Spanish

For each entry, there will be the translations of the dictionary, so if one entry is already included there is no extra value in adding this word and I'd say mark it as an error although it is correct.
It certainly is one of the reasons that a student from abroad is not as good in English as people who were born in America. This is an obstacle for all students and a challenge for the educational system.
If you're still interested in our agreement, I will be glad to continue to correct your letters and essays. Write it in English, if you do not know a particular word and I'll translate it.