진행을 막거나 방해하는 물리적 또는 추상적인 것.
A thing that blocks one's way or prevents or hinders progress; a barrier or difficulty.
예문:
"The fallen tree became an unexpected obstacle on the hiking trail."
"Lack of funding proved to be the biggest obstacle to completing the research project."
"She overcame every obstacle placed in her path to achieve her dream of becoming a doctor."