This is the 11350th most frequent Korean word.
김일성대원수님의
"Of Great Leader Kim Il-sung"
Here, '김일성대원수님의' serves as a possessive adjective referring to the achievements of Kim Il-sung.
김일성대원수님의 업적은 매우 위대하였다.
Great Leader Kim Il-sung's achievements were very remarkable.
In this sentence, '김일성대원수님의' denotes possession, specifying that the speech belongs to Kim Il-sung.
나는 김일성대원수님의 연설문을 읽고 깊은 인상을 받았다.
I was deeply impressed by reading Kim Il-sung's speech.
Here, '김일성대원수님의' refers to the ideology proposed by Kim Il-sung, again functioning as a possessive adjective.