So quick question Should you accept a ring from someone who cheated on you ... even when they said sorry (asking for a friend lol)

Depends on how you feel in your heart.

Explanation:

If they cheated, they've obviously done you wrong.

But! Taking into fact they apologized, and now are offering what appears to be a peace offering, I'd accept if you feel you truly know that person is attempting to heal the relationship.

your word would be isle.

isle is an island or peninsula especially a small one.

if you add the letter "a" you get aisle, which is a passage between 2 rows of something like chairs, shelves, or something else.