Poverty or destitution: an extreme lack of means or resources (somewhat formal/written usage).
戦後、多くの人々が窮乏に苦しんだ。
After the war, many people suffered from destitution.
学生時代は窮乏していたが、努力して道を切り開いた。
I was impoverished during my student days, but I worked hard and made my way.