This is the 980th most frequent Hungarian word.
kutatás
Research.
In this sentence, 'kutatása' is a possessive form referring to someone's conducted research or a specific study.
Az ő kutatása hozzájárult a betegség kezelésének új módszereihez.
His research contributed to new methods for treating the illness.
The plural possessive form 'kutatásaim' conveys that the person is discussing the research they personally conducted.
Kutatásaim során sok érdekes adatot találtam.
In the course of my research, I found much interesting data.
Here, 'kutatás' refers to the act of research or systematic study to discover information or reach new understanding.