This is the 1885th most frequent Spanish word.
investigador
Investigator; researcher.
In this sentence, 'investigador' is used as a noun to refer to a person who carries out scientific research or investigation into a particular topic.
El investigador realizó un estudio detallado sobre el cambio climático.
The researcher conducted a detailed study on climate change.
Here, 'investigador' continues to be a noun but emphasizes the role or qualities of the researcher, specifically their dedication and effort in their field.
Siempre he admirado la dedicación del investigador en su trabajo.
I have always admired the dedication of the researcher in his work.
In this example, 'investigador' is used as a professional description of oneself—indicated by the phrase 'como investigador'—highlighting the tasks associated with the profession of research.