This is the 7563rd most frequent Russian word.
достоверность
Accuracy or reliability.
Here, 'достоверность' refers to the reliability or credibility of someone's statements.
Его слова внушают полное доверие и достоверность.
His words inspire complete trust and authenticity.
In this sentence, 'достоверность' signifies the level of trustworthiness or truthfulness of an information source.
Достоверность источника информации была под сомнением.
The reliability of the information source was in question.
In this context, 'достоверность' represents the necessity of maintaining the accuracy and validity of data for reliability.