This is the 614th most frequent Slovak word.
vlastných
"Vlastných" means "own" or "personal" in English.
Here, 'vlastných' is used as an adjective meaning 'own', functioning to describe the noun 'zbierok' (collections) in its genitive plural form, showing possession.
Čítam knihy z vlastných zbierok.
I read books from my own collections.
In this sentence, 'vlastných' is used as an adjective meaning 'own', modifying the noun 'ušiach' (ears) in its locative plural form, emphasizing personal involvement.
Počul som to na vlastných ušiach.
I heard it with my own ears.
Here, 'vlastnými' is in the instrumental plural form, describing the noun 'silami' (efforts) and underlining self-reliance.