This is the 8967th most frequent Korean word.
개는
"개는" means "dog is" or "dog does" depending on context.
In this sentence, '개는' refers to a dog as the subject of the sentence, providing information about its characteristics.
개는 꼬리가 기다란 동물이다.
A dog is an animal with a long tail.
Here, '개는' introduces the dog as the subject performing the action of running.
개는 공원에서 달리고 있다.
The dog is running in the park.
In this usage, '개는' defines the dog within the context as a beloved pet.