niche
/nɪtʃ, ni:ʃ; nɪtʃ/ n
1 shallow recess, esp in a wall （浅的）凹处; （尤指）壁龛
a niche with a shelf 有格架的壁龛. =>illus 见插图.
2 (fig 比喻) suitable or comfortable position, place, job, etc 适合的或舒适的位置、 地方、 职业等
I don't think he's yet found his niche in life, ie the occupation that gives him most satisfaction and happiness. 我认为他还没找到生活的归宿.