What does the prefix theo- mean?
Theo- comes from the Greek theos, which means "god". It appears in religious, philosophical and political vocabulary, always related to God or the divine.

Prefix · god · divine
Means "god": theology, theocracy, theism, theodicy, theocentric.
Written by Bryan López, English teacher · Updated
Theo- comes from the Greek theos, which means "god". It appears in religious, philosophical and political vocabulary, always related to God or the divine.
Theo- connects religion and philosophy. It is used both to talk about the study of faith and to name the different ways of believing, or not believing, in one or several gods. The root is also behind well-known first names, like Theodore and Theodora, which mean "gift of God".
Combines with Greek roots in religious, philosophical, and political vocabulary:
Pronunciation: /θiː.oʊ/.
theo-/θiː.oʊ/
Tap the button to hear how the prefix sounds. Each word in the table has its own audio.
"Theism" (theo- = god + -ism = belief): a philosophical position holding that one or more gods exist. "Theology" (theo- = god + -logy = study): the systematic academic discipline studying the nature of God, religious belief, and doctrine. You can hold theism without studying theology, and theologians can study religion without being personally devout.
A trick to remember it
Think of theology, the study of God: theo- = god. theology, atheist (a- + theo-).
Exercise 1 · Form the word
Exercise 2 · Pick the right one
How does "monotheism" differ from "polytheism"?
The prefix theo- means "god": theology, theocracy, theism, theodicy, theocentric.
The prefix theo- is pronounced /θiː.oʊ/. For example, "theology".
"ology" becomes "theology". It is a typical example of the theo- prefix.
un-, re-, pre-, dis-, over-, in-... every beginning you need to unlock thousands of English words at once.