This is the 5079th most frequent Spanish word.
extraño
Strange; odd; foreign; unfamiliar.
In this sentence, 'extraño' is used as an adjective meaning 'strange' or 'unusual', modifying the noun 'individuo'.
Él es un individuo muy extraño.
He is a very strange individual.
Here, 'extraño' is the first-person singular present indicative form of the verb 'extrañar', meaning 'to miss' or 'to long for'.
Extraño mucho a mi familia cuando estoy lejos.
I miss my family a lot when I am away.
In this case, 'extraño' functions as a noun meaning 'stranger' or 'unknown person'.