What are number prefixes?

Number prefixes are groups of letters at the beginning of a word that denote the quantity of the base word. For example, “bi-” means “two,” and a bicycle has two wheels (whereas a tricycle has three). The prefixes for each number are as follows:

  1. Uni- or mono-
  2. Bi- or di-
  3. Tri-
  4. Tetra-
  5. Penta-
  6. Hexa-
  7. Hepta-
  8. Octa-
  9. Ennea-
  10. Deca-

Words with number prefixes can be challenging to spell, but the QuillBot Grammar Checker will help you write them correctly.