This is the 1530th most frequent Korean word.
고개를
"고개를" means "the head" or "one's head" (as part of an action, e.g., turning or nodding the head).
고개를 is used to mean 'head' as an object being acted upon, specifically being raised.
고개를 들어 하늘을 보았습니다.
I raised my head to look at the sky.
고개를 is used to mean 'head' as an object being acted upon, specifically being lowered.
그는 걸어가며 고개를 숙였습니다.
He lowered his head while walking.
고개를 is used to mean 'head' as an object being acted upon, specifically being tilted.