This is the 309th most frequent Serbian word.
иако
"Иако" means "although" or "even though" in English.
Here, Иако (although) is used to introduce a clause that contrasts with the main clause where the action goes against the expectation created by the subordinate clause.
Иако је падала киша, отишли смо у парк.
Although it was raining, we went to the park.
This sentence uses Иако (although) to present a condition that contrasts with the usual behavior or expectation.
Иако је вече, и даље радимо.
Although it is evening, we are still working.
The word Иако (even though) introduces a surprising circumstance for the main statement.