This is the 5394th most frequent Russian word.
ошибках
"Ошибках" means "mistakes" or "errors" in English.
The word 'ошибках' is used in the prepositional case to mean 'mistakes' with the preposition 'на', indicating the context of learning from them.
Мы учимся на своих ошибках.
We learn from our mistakes.
Here, 'ошибках' appears in the prepositional case governed by the preposition 'об', referring to mistakes as the subject of reflection.
Он всегда размышляет об ошибках прошлого.
He always reflects on the mistakes of the past.
In this sentence, 'ошибках' is also in the prepositional case, following the preposition 'из-за', indicating the cause of an event.