Prefix · universe / world / order
From Greek "kosmos" (universe, order): found in words about space, the whole world, and universal scale.
Written by Bryan López, English teacher · Updated
"Cosmo-" comes from Greek "kosmos," which meant order, arrangement, and by extension the universe as an ordered whole. Ancient Greeks saw the cosmos as a perfectly ordered system — the opposite of chaos. The prefix appears in astronomy, philosophy, and beauty products.
The prefix is identical in Spanish: cosmología (cosmology), cosmopolita (cosmopolitan), cosmos (cosmos). Even "cosmética" (cosmetics) shares the root, because the Greeks used "kosmos" to mean adornment and beautification as well as the universe.
Cosmo- combines with other roots to describe the universe and world-spanning concepts:
"Cosmonaut" is the Soviet/Russian equivalent of "astronaut" — a traveler of the cosmos. Both words describe space travelers from different space-age traditions.
cosmo-/ˈkɒz.moʊ/
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Greeks used "kosmos" for both the ordered universe and personal adornment. "Cosmetics" comes from "kosmein" (to arrange, to adorn), derived from "kosmos." The connection is real: both involve the idea of order and arrangement.
A trick to remember it
Cosmo- = universe / ordered world. Remember that "cosmos" and "cosmetics" share a root — the Greeks saw both the universe and personal grooming as expressions of order. A "cosmopolitan" person is so familiar with the whole world that they feel at home everywhere.
Exercise 1 · Form the word
Exercise 2 · Pick the right one
A city described as "cosmopolitan" is best characterized as ___.
The prefix cosmo- from Greek "kosmos" (universe, order): found in words about space, the whole world, and universal scale. In Spanish it usually maps to cosmo-.
The prefix cosmo- is pronounced /ˈkɒz.moʊ/. For example, "cosmology".
"logy" becomes "cosmology". It is a typical example of the cosmo- prefix.
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