Fideicommissum heredem rogat ut pecuniam amico tradat.

Because fideicommissum is in the nominative singular, which is the case normally used for the subject.

Here it is a neuter second-declension noun:

• nominative singular: fideicommissum
• accusative singular: also fideicommissum

So you have to decide from the sentence structure which role it is playing. Since rogat needs someone to do the asking, fideicommissum is understood as the subject: The fideicommissum asks...

This is also a legal term in Roman contexts: a fideicommissum is a kind of trust or requested bequest.

Because heredem is the direct object of rogat.

The verb rogo commonly works like this in Latin:

• aliquem rogare = to ask someone
• often followed by ut
  • subjunctive for what you ask them to do

So:

• fideicommissum = the thing doing the asking
• heredem = the heir being asked

That is why heredem is accusative singular.

After verbs of asking, urging, persuading, and commanding, Latin very often uses ut + subjunctive rather than an infinitive.

So:

• rogat ut pecuniam tradat = asks that he hand over the money
• in more natural English: asks him to hand over the money

English prefers to hand over, but Latin prefers a subordinate clause here.

This is a very common pattern:

• rogo ut veniat = I ask that he come / I ask him to come
• moneo ut fugiat = I warn him to flee
• imperat ut maneant = he orders them to remain

Because it is inside an ut-clause dependent on rogat.

With verbs like rogo, the action requested is regularly expressed by:

• ut
  • present or imperfect subjunctive

Here tradat is the present subjunctive active, third person singular, from trado.

So ut pecuniam amico tradat means:

• that he hand over the money to the friend
• or more idiomatically, to hand over the money to the friend

The subjunctive is required by the construction, not because the action is doubtful.

The understood subject of tradat is heredem in sense, that is, the heir.

Latin often leaves out a subject pronoun when it is clear from context. So the structure is:

• Fideicommissum = subject of rogat
• heredem = object of rogat, and the person expected to perform tradat

So the meaning is:

• The fideicommissum asks the heir to hand over the money to a friend.

Because pecuniam is the direct object of tradat.

The verb trado means hand over, deliver, or transfer, and the thing being handed over goes into the accusative.

So:

• pecuniam tradat = he may hand over the money

This is straightforward object use of the accusative.

Because amico is the indirect object: the person to whom the money is handed.

With verbs like do, trado, mitto, Latin often puts the recipient in the dative.

So:

• pecuniam amico tradat = hand over the money to a friend

Compare:

• librum puero dat = he gives a book to the boy
• epistulam amico mittit = he sends a letter to a friend

Grammatically, rogat means asks. But in a legal or formal context, especially with a word like fideicommissum, the force can be stronger than an everyday polite request.

A fideicommissum in Roman law is a formal request attached to an inheritance arrangement, so rogat may function more like:

• requests
• directs
• asks as part of a legal instruction

So the exact English tone depends on context, even though the Latin verb itself is rogat.

Rogat is:

• third person singular
• present tense
• indicative mood
• active voice

from the verb rogo, rogare.

So it means:

• he/she/it asks

Since fideicommissum is neuter singular, here it means:

• it asks

Latin word order is much more flexible because the endings show the grammatical roles.

Even if the words are not in English order, the cases tell you what each word is doing:

• fideicommissum = nominative subject
• heredem = accusative object of rogat
• pecuniam = accusative object of tradat
• amico = dative indirect object

So Latin can arrange words for emphasis, rhythm, or style without causing much confusion.

A very literal analysis is:

• Fideicommissum = the trust/bequest
• heredem = the heir
• rogat = asks
• ut = that
• pecuniam = money
• amico = to a friend
• tradat = he hand over

English then smooths this out into a more natural order.

It is a technical Roman legal term. A fideicommissum is a kind of entrusted bequest or trust arrangement, especially in inheritance law.

Historically, it referred to property left with the expectation or request that it be passed on in a certain way. That is why it makes sense with verbs like rogat and with a person like heredem.

So this is not everyday conversational Latin; it sounds like legal Latin.

Not in the normal classical pattern for this meaning.

English says:

• asks the heir to hand over the money

But classical Latin usually says:

• heredem rogat ut pecuniam tradat

That is, ask someone to do something becomes:

• aliquem rogare ut...

So if you try to translate too literally from English, you may expect an infinitive, but Latin usually chooses ut + subjunctive here instead.

Latin has no articles, so amico by itself can mean either:

• to a friend
• to the friend

You decide from context.

In an isolated teaching sentence, English often uses a friend because nothing has been specified before. But if the context had already introduced a particular friend, the friend would also be possible.