PLURAL FORMS FOR NOUNS ADOPTED FROM OTHER LANGUAGES

  • Nouns ending with “-is” (such as “hypothesis, diagnosis, analysis, basis, crisis, thesis, oasis, synthesis, synopsis, emphasis, paralysis, parenthesis”) are made plural by changing the ending with “–es”.

schlechte horror spiele den der ler sidst ler bedst Diagnosis                    diagnoses

ruby laser autonivel there Crisis                          crises

Thesis                         theses

Parenthesis                 parentheses

 

  • Nouns ending with “”-um” (such as “bacterium, datum, curriculum, medium”) are made plural by changing the ending with “–a”.

Bacterium                   bacteria

Datum                        data

Curriculum                 curricula

Medium                      media

 

  • Nouns ending with “-on” are made plural by changing the ending with “–a”.

Criterion                     criteria

Phenomenon               phenomena

 

  • Nouns ending with “-a” (such as “alga, larva, formula, antenna, vertebra, vita”) are made plural by changing the ending with “–ae”.

Formula                      formulae

Antenna                      antannae

 

  • Nouns ending with “–ex/ix” (such as “appendix, index, matrix, vertex, vortex, apex, cervix, axis”) are made plural by changing the ending with “–ices”.

Appendix                   appendices

Index                          indeces

Axis                            axes

 

  • Nouns ending with “– us” (such as “alumnus, bacillus, cactus, focus, octopus, radius, stimulus, terminus”) are made plural by changing the ending with “–i”.

Bacillus                       bacilli

Cactus                        cacti

Focus                          foci

Octopus                      octopi

 

  • Nouns ending with “–eau” (such as “bureau, beau, portmanteau, tableau”) are made plural by changing the ending with “–eaux”.

Bureau                          bureaux

Portmanteau               portmanteaux

Tableau                       tableaux

 

  • Others:

Libretto                      libretti

Tempo                         tempi

Virtuoso                      irtuosi

Seraph                        seraphim

Schema                       schemata