This is the 14249th most frequent Russian word.
оспаривании
Disputing or challenging.
Here, 'оспаривание' is used in the context of challenging a will in a legal setting.
Юрист дал совет клиенту при оспаривании завещания.
The lawyer advised the client when contesting the will.
In this case, 'оспаривание' refers to disputing or challenging a scientific viewpoint.
При оспаривании научной теории требуются веские аргументы.
When disputing a scientific theory, strong arguments are required.
Here, 'оспаривание' involves formally challenging a judicial decision.