Word.ws English Dictionary

os-

os- prefix: against; facing; a combining prefix found in verbs of Latin origin.

Prefix

os-

  1. (idiomatic) Against; facing; a combining prefix found in verbs of Latin origin.

Origin of os-

From Latin ob.

Words formed from os-

Questions about os-

What does os- mean?
Os- means against; facing; a combining prefix found in verbs of Latin origin.
What part of speech is os-?
Os- is a prefix.

Words near os- in the dictionary

  1. os trochleare calcanei
  2. OS X
  3. OS&D
  4. OS&Y
  5. OS&Ys
  6. os-
  7. OS-specific
  8. OS.
  9. OSA
  10. OSAA
  11. Osage

Source and license

Adapted from Wiktionary: os- (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “os-.” Word.ws, https://word.ws/os-. Based on Wiktionary, CC BY-SA 4.0.