This is the 3310th most frequent Russian word.
ошибку
The Russian word "ошибку" means "mistake" or "error."
Here, 'ошибку' (a mistake) is used in the accusative case as the object of the verb 'допустил' (made). It demonstrates use in the context of an error committed in an action.
Я допустил ошибку в тесте.
I made a mistake in the test.
In this instance, 'ошибка' (a mistake) is in the nominative case, acting as the subject of the sentence. It showcases how the noun can signify a cause leading to a consequence.
Ошибка привела к потере данных.
The mistake caused data loss.
Here, 'ошибку' is in the accusative case after the preposition 'за', indicating what is being referred to — the mistake for which apologies are made.