The Latin Genitive and Dative in Practice

The cases article gave you the map: genitive means of, dative means to or for. That is true, and it is roughly a third of what these two endings actually do. This article is the rest of it.

Here is why they are worth the extra effort. Between them, the genitive and the dative do the work that English spreads across of, 's, to, for, from and a shelf of verb complements. Miss one and a sentence does not simply lose a nuance, it gets read backwards.

The forms, in one place

Two things to notice, because they cause most of the trouble.

First, the dative plural is always the same as the ablative plural. Every declension, no exceptions. That looks like a loss of information and is not one: regibus will be sitting next to a verb of giving or next to a preposition, and that settles it.

Second, the first declension is a mess of its own making. Terrae is genitive singular, dative singular and nominative plural. Three jobs, one form. You will not fix that by staring at the word.

The genitive is a noun-to-noun connector

The core instinct: a genitive is glued to another noun, not to the verb. When you see one, look for the noun it belongs to, which in Latin usually sits just before it.

Possession, the obvious one:

Liber regis. The king's book.

Filius dei. The son of God.

Partitive, the whole from which a part is taken:

Pars militum. Part of the soldiers.

Nemo nostrum. None of us.

This one extends further than English does. Neuter quantity words take a genitive where English would use a plain adjective or nothing at all:

Nihil novi. Nothing new (literally: nothing of new).

Satis pecuniae. Enough money.

Multum vini. A lot of wine.

Description, where a genitive plus an adjective characterises someone:

Vir magnae virtutis. A man of great courage.

The adjective is not optional there. A bare vir virtutis is not idiomatic; the genitive of description wants the adjective to carry the description.

Objective and subjective, which is the one people argue about. Take:

Amor dei.

That can mean the love God has (subjective: God is doing the loving) or the love directed at God (objective: God is what is loved). Latin does not disambiguate, and I am going to take a side here: the standard advice to work out which one is meant is often unanswerable, because Christian Latin in particular exploits the ambiguity deliberately. Timor hostium is fear the enemy feel or fear of the enemy, and a decent writer knew both readings were live. Read both, pick the one the passage supports, and stop expecting the grammar to decide it for you.

The dative is a verb-to-person connector

The core instinct: a dative marks someone the action reaches. Not the thing acted on, which is the accusative, but the person on the receiving end or with a stake in it.

Indirect object, with verbs of giving, telling, sending and showing:

Regi librum do. I give the book to the king.

Militibus verba dixit. He said words to the soldiers.

Do, dico, mitto, trado, ostendo, reddo, scribo: all of these routinely carry an accusative for the thing and a dative for the person.

Possession, the construction English has no equivalent for:

Est mihi liber. I have a book.

Literally: there is a book to me. It is not exotic and it is not archaic. It sits alongside habeo librum, and the difference is emphasis. Habeo foregrounds the owner; est mihi foregrounds the thing owned, which is exactly why Latin states names this way:

Nomen mihi est Marcus. My name is Marcus.

Verbs that take a dative instead of an accusative. This is the part that gets taught as an arbitrary list, and I think that framing is backwards. These verbs are not doing anything strange in Latin. They are intransitive, and the person involved is a beneficiary, not a victim. It is the English translation that misleads, because English happens to make them transitive.

Read the right-hand column and the dative stops being a rule to memorise:

Deo credo. I trust God.

Regi paremus. We obey the king.

Puella patri placet. The girl pleases her father.

Deum credo would be a different sentence entirely, and a wrong one. Note also that credo splits: the person trusted is dative, the thing believed is accusative. Both can appear at once.

Adjectives play the same game. Similis, par and proximus take a dative for the thing compared to: similis patri, like his father; par regi, a match for the king.

Telling the two apart at speed

The overlaps are real, so here is the practical drill.

• Second declension: genitive singular -i (domini), dative singular -o (domino). Different. But domini is also nominative plural, so check the verb.
• Third declension: genitive singular -is (regis), dative singular -i (regi). Different, and reliably so.
• First declension: -ae is genitive singular, dative singular and nominative plural. Not different. Use position.
• All declensions: dative plural equals ablative plural. Use the preposition, or its absence.

When an -ae or an -i form appears, ask what it is standing next to. Hard against another noun, it is a genitive. Loose in the sentence near a verb of giving, obeying or pleasing, it is a dative. That question answers it more often than any ending chart will.

What to take away

• A genitive attaches to a noun; a dative attaches to the verb.
• The partitive genitive covers pars, nihil, satis, multum and nemo, where English would often use no of at all.
• Amor dei is genuinely ambiguous, and good writers knew it.
• Est mihi liber is as ordinary as habeo librum, and is the standard way to give a name.
• Credo, pareo, placeo, servio, noceo, faveo, persuadeo and impero take the dative because they are intransitive in Latin, not because Latin is being awkward.

Next: what happens when the subject stops doing the verb and starts receiving it, and the verbs that took the passive endings and kept their active meaning anyway.