This is the 5902nd most frequent Russian word.
репрессии
Repressions; punitive measures or actions, often state-enforced, to suppress dissent or control opposition.
Here, 'репрессии' is used as a noun representing systematic actions of suppression, often political.
В начале 20 века в стране произошли массовые репрессии.
In the early 20th century, the country experienced mass repressions.
In this sentence, 'репрессиях' refers to targeted suppressive actions against a specific group, showing personal implication.
Она написала книгу о репрессиях против её семьи.
She wrote a book about repressions against her family.
Here 'репрессий' is utilized to denote events studied analytically, focusing on historical and social multifacetedness.