Word.ws English Dictionary

-oi

UK/-ɔɪ/

-oi is the plural of -os.

Meaning of -os

Suffix

-os

  1. Used to form plurals of some Hebrew and Yiddish loanwords, usually ending in -a or -ah.
    Synonyms:
    -as, -ahs, -ot, -oth

Origin of -oi

From the Ancient Greek -οι (-oi), the second-declension masculine nominative plural case ending — the plural form of -ος (-os); compare the equivalents of the Latin second declension (-us → -ī), with which the Grecian case endings are usually substituted in English words, especially in the plural.

Words formed from -oi

Questions about -oi

What is -oi the plural of?
-oi is the plural of -os.
How do you pronounce -oi?
-oi is pronounced /-ɔɪ/ (UK).

Words near -oi in the dictionary

  1. -oes
  2. -off
  3. -offs
  4. -oh
  5. -oholic
  6. -oi
  7. -oic
  8. -oid
  9. -ol
  10. -ola
  11. -olater

Source and license

Adapted from Wiktionary: -oi (page history and authors); -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.

Last updated:

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