Ordinal Numbers
| Ordinals in Portuguese 1-100 | ||
| 1st | primeiro | pre-may-roh |
| 2nd | segundo | seh-goon-doh |
| 3rd | terceiro | ter-say-roh |
| 4th | quarto | ku-ar-toh |
| 5th | quinto | keen-toh |
| 6th | sexto | says-toh |
| 7th | sétimo | seh-chee-moh |
| 8th | oitavo | oy-tah-voh |
| 9th | nono | noh-nu |
| 10th | décimo | dess-ee-moh |
| 11th | décimo primeiro | dess-ee-moh-pre-may-roh |
| 12th | décimo segundo | dess-ee-moh-seh-goon-doh |
| 20th | vigésimo | vee-gess-ee-moh |
| 21st | vigésimo primeiro | vee-gess-ee-moh-pre-may-roh |
| 22nd | vigésimo segundo | vee-gess-ee-moh-seh-goon-doh |
| 30th | trigésimo | tree-gess-ee-moh |
| 40th | quadragésimo | kuah-dra-gess-ee-moh |
| 50th | qüinquagésimo | ku-een-ku-ah-gess-ee-moh |
| 60th | sexagésimo | says-tah-gess-ee-moh |
| 70th | septuagésimo | sep-too-ah-gess-ee-moh |
| 80th | octogésimo | ock-tah-gess-ee-moh |
| 90th | nonagésimo | noh-nah-gess-ee-moh |
| 100th | centésimo | sen-tess-ee-moh |
| 101st | centésimo primeiro | sem-tess-ee-moh-pre-may-roh |
As you can see, once you get to 30, the numbers get geometric (ex. quadragésimo ~ quadrado)! Also, note the numbers are all masculine here. When the noun is feminine, for all the numbers above, you switch the last “o” of each word with an “a.”
