impediment
/ɪmˈpedɪmənt; ɪm`pɛdəmənt/ n
1 ~ (to sb/sth) person or thing that hinders or obstructs the progress or movement of sth 妨碍、 阻碍某事物进展或活动的人或物
The main impediment to growth was a lack of capital. 影响发展的主要障碍是缺乏资本.
2 physical disability of a specified type; defect 身体上的某类残疾; 缺陷
a speech impediment, eg a lisp or a stammer 言语障碍（如口齿不清或口吃）.