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Latin · Degrees of comparison of adjectives (comparative degree)

Comparative degree of adjectives

Gradus comparativus

The comparative degree of Latin adjectives (gradus comparativus) is formed from the positive degree stem using special suffixes. The suffix -ior is used for the masculine and feminine genders, and -ius for the neuter gender.

Degrees of comparisonPositive, comparative, superlative
Suffix m, f-ior
Suffix n-ius
Declension typeThird declension
4 min readFor medical studentsUpdated 09/24/2026
Material prepared by WhiteCoat Pro editorial team based on platform study guidesReviewed by medical editor: Aulov A. A., general practitioner · 09/24/2026

Three degrees of comparison in Latin

Latin qualitative adjectives can express a quality with varying intensity. Grammar provides three degrees of comparison for this purpose:

  1. Positive (gradus positivus) — denotes the basic quality of an object.
  2. Comparative (gradus comparativus) — indicates that the quality is expressed more strongly than in another object.
  3. Superlative (gradus superlativus) — denotes the highest degree of a quality.

The main grammatical marker that reliably identifies the gradus comparativus form is the presence of characteristic suffixes attached to the dictionary stem.

Formation rules and suffixes

To form the comparative degree, take the stem of the adjective in the positive degree and add the appropriate suffix. The choice of suffix depends strictly on the grammatical gender of the noun with which the adjective agrees:

  • For masculine (masculinum, m) and feminine (femininum, f) genders, the suffix -ior is used.
  • For the neuter (neutrum, n) gender, the suffix -ius is applied.

Let us examine this algorithm using specific examples of various adjective types:

Positive degreeComparative degree (m, f)Comparative degree (n)
longus, a, um (long)longiorlongius
ruber, bra, brum (red)rubriorrubrius
brevis, e (short)breviorbrevius
simplex, icis (simple)simpliciorsimplicius
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How to determine the practical stem

A crucial rule to master for correct inflection: the stem of an adjective in the comparative degree always completely coincides with its masculine and feminine nominative singular form (Nominativus singularis).

Let's look at this rule using the word latior (broader):

  • Nom. sing. for masculine (m): latior
  • Nom. sing. for feminine (f): latior
  • Nom. sing. for neuter (n): latius

Thus, the practical stem for all further grammatical transformations and declensions in this case will be latior-.

Declension features

All adjectives in the comparative degree behave identically when declined by case. Regardless of the declension to which the original positive-degree word belonged, in the gradus comparativus form they decline strictly according to the rules of the third declension.

The main feature to remember when working with dictionaries and texts:

  • The genitive singular form (Genitivus singularis) is completely identical for all three genders (masculine, feminine, and neuter).
  • To obtain the genitive form, add the standard third-declension ending -is to the previously identified stem (which ends in -ior).

For example, for the word meaning 'shorter', the nominative is brevior (m, f) and brevius (n), while the genitive for all genders is brevioris.

Briefly: answers to topical questions

What are the rules for forming the superlative degree of Latin adjectives?

The superlative degree of Latin adjectives is formed using suffixes with double consonants and has the gender endings -us, -a, -um.

The marker of the superlative degree is one of the following morphemes:

  • Suffix -issim- (-ss-) — contains a double consonant.
  • Suffix -errim- (-rr-) — contains a double consonant.
  • Suffix -illim- (-ll-) — contains a double consonant.

Superlative adjectives decline according to the first and second declensions. In their dictionary form, they have three gender endings (e.g., latissimus, a, um).

What exceptions exist in the formation of degrees of comparison in Latin?

Exceptions in forming degrees of comparison are suppletive forms derived from altered roots.

Positive degreeComparative degreeSuperlative degree
magnus, a, ummajor, jusmaximus, a, um
parvus, a, umminor, usminimus, a, um

There is also a special case: the comparative degree superior, ius forms the superlative supremus, a, um.

How does the comparative degree decline in the plural according to the third declension?

Comparative adjectives in the plural decline according to the third declension and have the nominative plural (Nom. pl.) ending -es for the masculine and feminine genders.

  • Masculine and feminine genders (m, f) — Nom. pl. ends in -es (e.g., majores).

The full plural declension paradigm (including neuter gender and oblique cases) is not presented in the sources.

How to memorize

To avoid confusion when finding the genitive stem, remember a simple equation: Comparative stem = -ior form. Add -is to it.

Class and exam questions

Which suffixes indicate the comparative degree?

The suffix -ior is used for masculine and feminine (e.g., longior), and -ius for neuter (e.g., longius).

How to find the adjective stem in gradus comparativus?

The stem always matches the masculine and feminine nominative singular form, meaning it always ends in -ior.

Which declension do such adjectives follow?

All comparative adjectives decline exclusively according to the Latin third declension rules.

How is the genitive form (Genitivus singularis) formed?

It is identical for all three genders. To form it, add the ending -is to the stem (-ior form) (e.g., latioris).

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What else to study on this topic

  • Complete paradigm of case endings of the 3rd declension for the comparative degree
  • Algorithm for determining the stem of positive-degree adjectives (e.g., ruber and simplex)
  • Formation of the superlative degree (gradus superlativus)
  • Agreement of comparative-degree adjectives with nouns of different genders

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