over-intellectualized
/ˌəʊv(ə)rɪntɪˈlɛktʃʊəlʌɪzd/ /ˌəʊv(ə)rɪntɪˈlɛktʃ(ʊ)lʌɪzd/ /ˌəʊv(ə)rɪntɪˈlɛktjʊəlʌɪzd/adjective
Made excessively intellectual; treated in too rational a way.
Origin
1920s; earliest use found in Alfred North Whitehead (1861–1947), mathematician and philosopher. From over-intellectualize + -ed.