obstacle

/ˈɑbstəkəl/

something immaterial that stands in the way and must be circumvented or surmounted

中文释义：障碍；阻碍

Lack of funding is a major obstacle to completing the research project.

缺乏资金是完成研究项目的主要障碍。

Overcoming language barriers is an obstacle that many immigrants face.

克服语言障碍是许多移民面临的障碍。