Latin/Index II

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For explanations of terms used in these grammar tables, check the Glossary.

Declension of Nouns

1st Declension Masculine (each word has a set gender) puella

1st Declension	Singular	Plural
nominative	puell-a	puell-ae
vocative	puell-a	puell-ae
accusative	puell-am	puell-as
genitive	puell-ae	puell-arum
dative	puell-ae	puell-is
ablative	puell-a	puell-is

2nd Declension Masculine/Feminine (each word has a set gender): servus

2nd Declension Masculine	Singular	Plural
nominative	serv-us	serv-i
vocative	serv-e	serv-i
accusative	serv-um	serv-os
genitive	serv-i	serv-orum
dative	serv-o	serv-is
ablative	serv-o	serv-is

2nd Declension Neuter: bellum

2nd Declension Neuter	Singular	Plural
nominative	bell-um	bell-a
vocative	bell-um	bell-a
accusative	bell-um	bell-a
genitive	bell-i	bell-orum
dative	bell-o	bell-is
ablative	bell-o	bell-is

2nd Declension Masculine: puer

2nd Declension Masculine	Singular	Plural
nominative	puer	puer-i
vocative	puer	puer-i
accusative	puer-um	puer-os
genitive	puer-i	puer-orum
dative	puer-o	puer-is
ablative	puer-o	puer-is

2nd Declension Masculine: ager

2nd Declension Masculine	Singular	Plural
nominative	ager	agr-i
vocative	agr-e	agr-i
accusative	agr-um	agr-os
genitive	agr-i	agr-orum
dative	agr-o	agr-is
ablative	agr-o	agr-is

3rd Declension Masculine or Feminine (each word has a set gender): rex

3rd Declension	Singular	Plural
nominative	rex	reg-es
vocative	rex	reg-es
accusative	reg-em	reg-es
genitive	reg-is	reg-um
dative	reg-i	reg-ibus
ablative	reg-e	reg-ibus

3rd Declension Neuter: mare

3rd Declension Neuter	Singular	Plural
nominative	mar-e	mar-ia
vocative	mar-e	mar-ia
accusative	mar-e	mar-ia
genitive	mar-is	mar-ium
dative	mar-i	mar-ibus
ablative	mar-i	mar-ibus

4th Declension Masculine/Feminine (each word has a set gender) gradus

4th Declension	Singular	Plural
nominative	grad-us	grad-us
vocative	grad-us	grad-us
accusative	grad-um	grad-us
genitive	grad-us	grad-uum
dative	grad-ui	grad-ibus
ablative	grad-u	grad-ibus

4th Declension Neuter: cornu

4th Declension Neuter	Singular	Plural
nominative	corn-u	corn-a
vocative	corn-u	corn-a
accusative	corn-u	corn-a
genitive	corn-us	corn-uum
dative	corn-ui	corn-ibus
ablative	corn-u	corn-ibus

5th Declension Masculine/Feminine (each word has a set gender): res

5th Declension Feminine/Masculine	Singular	Plural
nominative	r-es	r-es
vocative	r-es	r-es
accusative	r-em	r-es
genitive	r-ei	r-erum
dative	r-ei	r-ebus
ablative	r-e	r-es

m = masculine

f = feminine

n - neuter

NOTES

4/5th declensions are modified 3rd declensions, thus behave similarily. 3rd declension is either M/F/N, 4th declension is either M/F/N and 5th declension is either M/F. So for 3rd, 4th, and 5th declension is of most importance to memorise the gender because the adjective will still need to agree (ie have the same) with the noun in both case, gender, and number.

The Vocative only changes for the 2nd declension masculine singular (however not for the nouns that leave the -us suffix when in nominative).

There are a few exceptions in the 1st declension which are not feminine. Such nouns are poet-a (1st declension masculine, so to agree you need to use -us on the adjective) and naut-a.

There are a few second declension nouns with irregularities. It is of most importance that you memorise them.

When memorising a noun's meaning, make sure that you also memorise any irregularities the noun has, the gender, and the declension. Without doing this you may have trouble translating. For example, 2nd declension masculines have -us in the nominative singular; however, 4th declension masculines have -us in the nominative singular, nominative plural and accusative plural. This may get you confused if you do not memorise the declension of each noun.

Single Declension Theory

If you look at the above list of declensions, you may feel that you are going to be overcome if you have to memorize all of it. Memorization is indeed the key, but it will be easier than you think.

Each word in Latin has three parts: the root, the stem vowel, and the ending. There are five vowels in Latin, so there are five stem vowels: A,O,I,U,E. Any word not really having a stem vowel naturally was given to I.

If you study the declension patterns enough you will see that there are many similarities in the declensions. All accusative singulars end in "m" except neuters that sometimes still do. All accusative plurals end in 's' except neuters that always end in a. All genitive plurals end in "um", be it ium, rum, uum or whatever else.

If you read enough Latin you will actually find that authors would switch a declension of a word at will if it made the sentence clearer. Thus many words that are of the 4th declension were sometimes written as if 2nd, and 5th declension as if 3rd and vice versa. Some ending patterns that we use for one declension may also be used in another, again to make the sentence clearer. Thus "filiabus" would be used in any sentence where we want to make it clear that we are talking about the Daughters and specifically not the Sons. We also see examples of this in animabus. Some think that the IS used in the first and second declensions was actually an abbreviation of bus.

Some students find the ablative difficult since it sometimes looks like the nominative singular, dative plural or neither. All you really need to do to get the hang of this is to know that in the plural, the ablative always looks like the dative. If there is no preposition in front of it then it is probably a dative, unless it is being used in an ablative construction that would likely be apparent. If there is a preposition and it looks like a dative, just remember that no preposition takes a dative, only ever ablative and sometimes accusative. Dative plural plus preposition equals ablative. The ablative singular is really just the root plus the stem vowel with no ending to speak of, since the preposition tells you the grammar of the word.

Some students also get confused by words that are the same in the nominative singular and plural. Don't worry about that; the verb will tell you which it is since the verb always agrees with the nominative.

It is thought that originally there was only one declension, but during the task of applying it to every word in natural speech it was found that some words naturally changed the way the basic sounds of the original declension worked. Here is one idea of the original basic declension.

Case	Root	Stem Vowel	Singular	Plural
nominative	puell	a	None	es
genitive	puell	a	is	rum
dative	puell	a	i	bus
accusative	puell	a	m	s
ablative	puell	a	none	bus

When speaking in everyday conversation, Latin speakers would shorten the word in their pronunciation so long as it still made sense.

If you go to New Orleans you will likely hear someone say 'prowly'. This is not a new dish at a restaurant or a new new code name for the police, it is actually the local pronunciation of the word probably. It is ok to shorten this word because when it is shortened everyone can still understand it.

The Latins did the same thing. It is known that I can change to E and vice versa, so we can see that pattern in the dative singular of all declensions. The IS of the genitive was kept in the 3rd declension, shortened in the 1st, 2nd, and 5th and slightly altered in the 4th. The 'add M' rule of the accusative singular is seen in the altering of the stem vowel in the 2nd and 3rd declensions. The ES of the nominative plural became E in 1st, I in 2nd, and US in 4th. The RUM of the genitive plural was shortened in the 3rd and 4th declensions.

The accusative plural as a rule never changes, but keep in mind that neuter words followed a different pattern of using A for the accusative plural, and all neuters took the accusative singular or plural for the nominative of the same number.

The BUS of the dative/ ablative plural was shortened to IS in the 1st and 2nd declensions but kept in the others.

The 4th declension has a tendency to copy the IBUS of the 3rd in some authors but retain the UBUS in others.

When studying Latin declensions you really should strive to memorize the patterns, but also look to see how they are similar to other patterns in the language as it will help you to remember. Also note that the IS of the genitive singular is what eventually gave us the word HIS and the 'add 's'" rule of English. Latin also gave us the 'add 's'" to make a plural by way of the accusative plural.

If you study other inflexive languages related to Latin, such as Greek, you will notice even similarities across languages.