Fetching details from the dictionary...
inequality; unfairness
教育の不平等が社会の格差を広げる。
Inequality in education widens the social gap.
貧富の差による不平等が問題になっている。
Inequality caused by the gap between rich and poor has become a problem.
男女間の不平等を解消するための法律が必要だ。
Laws are needed to eliminate inequality between men and women.