extro-

A pseudo-Latin prefix based upon Latin extra- (“outside, beyond”) under the influence of the distinction between Latin intro- (“inwards”) and intra- (“inside, within”). Formations in English are mostly limited to words formed as antonyms of terms formed with intro-.

extro-

1. outward, outwards.

   extroverted: turned in an outward direction

• intro-

• extra-

• e-
• ex
• ex-
• exo-
• extra-

• “extro-, prefix”, in OED Online ⁠, Oxford: Oxford University Press, 1894.

• oxter, retox