This is the 5646th most frequent Russian word.
предпринята
"Предпринята" means "undertaken."
The word 'предпринята' is used in the past passive participle form, expressing that an action (adjustment of methods) was carried out.
Для получения лучших результатов была предпринята корректировка методов.
To achieve better results, an adjustment of methods was undertaken.
Here, 'предпринята' indicates an action (thorough review) that was completed in response to the task.
По этой задаче была предпринята тщательная проверка.
A thorough review was undertaken for this task.
In this context, 'предпринята' refers to the action of undertaking an attempt to enhance the situation.