Although, In spite of
This expression is a combination of -(으)ㄴ/는데, which describes the situation under discussion, and -아/어도, which indicates concession or contrast. Thus, the expression is used to introduce a clause that indicates an opposite or an unexpected state of affairs when compared to the information given in the preceding clause.
To further emphasize the contrast or unexpectedness of the situation indicated by -(으)ㄴ/는데도, the phrase 불구하고 can be added to form -(으)ㄴ/는데도 불구하고.