The Latin root ag- (also seen as agi-, ig-, act-) comes from the Latin verb agere and most often means “to do, drive, or set in motion.”

In slightly different word lists and textbooks you’ll see it explained with very close phrases like:

  • “to do” or “act”
  • “to go, drive, move”
  • “to lead, set in motion, drive”

All of these point to the same core idea: ag- is about action or movement. For example:

  • agent – someone who does things on behalf of another
  • agenda – a list of things to be done
  • agile – able to move quickly and easily

So if you see ag-/act-/ig-/agi- in a word, you can usually think “doing, acting, driving, or moving.”

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