강아지가 · 강아지를
puppy; (casually) dog
Example
우리 집 강아지는 산책을 정말 좋아해요.
Our puppy really loves going for walks.
Word parts
Probably 개 'dog' + baby suffix -아지, as in 송아지 'calf', 망아지 'foal'.
Good to know
Koreans often call any pet dog 강아지, not just puppies, because it sounds cuter.