Word Knowledge

What does the prefix di- mean?

The prefix di- is a Greek prefix.  In my book, The ASVAB Tutor’s Word Knowledge and Paragraph Comprehension Study Guide, I present several pages filled with charts of prefixes, root words, and suffixes.  The charts show the meaning and an example for each one.  One of my charts reviews Latin and Greek roots for numbers.  Do you know what number the prefix di- means?  There are many words that contain the Greek prefix di-.  Some examples are dichotomy, dichromatic, digraph, diverge, digress, dilemma.  I will present the meaning tomorrow.