This is the 11056th most frequent Korean word.
기기가
"기기가" means "machines" or "devices" in English.
Here, "기기가" specifies "this device" as the subject, emphasizing its effectiveness.
이 기기가 정말 효과적이네요.
This device is truly effective.
Here, "기기가" refers to "the device," indicating a piece of electronic equipment. "가" is the subject marker attaching to "기기."
기기가 작동하지 않아요.
The device is not working.
In this sentence, "기기가" again refers to "devices," and "가" marks it as the subject of the sentence.