This is the 11213th most frequent Swedish word.
misstagen
"Misstagen" means "the mistakes" in English.
Here 'misstagen' means 'the mistakes', which is the definite plural form of 'misstag'.
Jag insåg misstagen jag hade gjort.
I realized the mistakes I had made.
In this example, 'misstagen' refers to previously mentioned mistakes and is used as a direct object with the definite plural form.
Han bad om ursäkt för misstagen.
He apologized for the mistakes.
Here, 'misstagen' is used in a prepositional phrase 'av misstagen', indicating 'from the mistakes' in its definite plural form.