a prefix, meaning “inwardly,” “within,” occurring in loanwords from Latin (introspection); occasionally used in the formation of new words (introjection).
Origin of intro-
< Latin, representing intrō (adv.) inwardly, within
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
in, into, or inwardintrovert
Word Origin for intro-
from Latin intrō towards the inside, inwardly, within
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
word-forming element, from Latin intro "on the inside, within, to the inside," from PIE *en-t(e)ro-, suffixed form of preposition *en "in" (see in).
Online Etymology Dictionary, © 2010 Douglas Harper
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.