This is the 3467th most frequent Spanish word.
estudiado
"Studied" or "well-educated."
Estudiado in this context is used as the past participle of the verb 'estudiar', indicating that the action of studying has been done in the past relative to the present time frame.
He estudiado mucho para el examen.
I have studied a lot for the exam.
Estudiado is used here as an adjective derived from the past participle, describing someone with considerable knowledge or formal study in a particular field.
Es una persona muy estudiada en ciencias.
He/She is a well-studied person in sciences.
Estudiado is again the past participle form, used within a subjunctive construction to describe a hypothetical past action.