This is the 3021st most frequent Russian word.
зависимость
Dependency or addiction.
The word 'зависимость' is used in the context of a personal dependence or reliance on a substance, here, coffee.
Её зависимость от кофе начала беспокоить её окружение.
Her dependence on coffee began to worry those around her.
The word 'зависимость' refers to a mathematical or logical relation of dependence between variables, specifically the variable's change over time.
В этой задаче зависимость переменной от времени очевидна.
In this problem, the dependence of the variable on time is evident.
Here, 'зависимость' indicates a correlation or relationship between two or more values, as seen through experimental validation.