This is the 8903rd most frequent Korean word.
강이나
"강이나" is not a standard Korean word. It may be a name, typo, or colloquial expression.
강이나 is used here to mean 'rivers or' as part of a paired example that highlights things from nature displaying beauty.
강이나 산은 자연의 아름다움을 보여줍니다.
Rivers or mountains showcase the beauty of nature.
강이나 is used here to suggest 'a river anywhere,' emphasizing choice or possibility.
어디 강이나 가까이 가면 시원할 거야.
If you go near a river, it'll be refreshing.
강이나 signifies 'a river or,' presenting it as possible destinations for the trip.