This is the 5186th most frequent Russian word.
неосторожности
"Carelessness" or "lack of caution."
Here, "неосторожности" (carelessness) is used to describe the lack of caution that led to an accident.
Из-за своей неосторожности он сломал телефон.
Because of his carelessness, he broke the phone.
In this context, "неосторожности" is used to generalize the concept of being careless, highlighting its consequences.
Неосторожности нужно всегда избегать, особенно на дороге.
Carelessness should always be avoided, especially on the road.
Here, "неосторожности" illustrates the causal relationship between the quality of being careless and the occurrence of problems.