Mater stolam in arca ponit, ne infans eam tangat.

Because stolam is the direct object of ponit (puts). It is the thing being put somewhere.

• stola = nominative singular, the robe/dress as the subject
• stolam = accusative singular, the robe/dress as the object

So in Mater stolam in arca ponit, the mother is doing the action, and the robe is receiving it.

With in, Latin uses different cases depending on the meaning:

• in + accusative = into (motion toward)
• in + ablative = in / on (location)

Here in arca uses the ablative, so it means in the chest/box as a location.

A learner might expect into the chest, and in many contexts Latin often does use in + accusative for that idea. But with some verbs like pono (I place/put), Latin can express the resulting location very naturally with in + ablative. So ponit in arca means she puts it in the chest.

Arca means a box, chest, or trunk. In this sentence it is a container where the mother puts the robe.

Its form here is ablative singular because it follows in in a locational sense:

• arca = box/chest
• in arca = in the box/chest

Eam means her or it, depending on context. Here it means it, referring back to stolam.

Why eam?

Because stolam is:

• feminine
• singular
• accusative in the second clause, because it is the object of tangat

So the pronoun has to match that:

• ea = nominative feminine singular
• eam = accusative feminine singular

Thus ne infans eam tangat = so that the baby may not touch it.

Because ne introduces a negative purpose clause.

The idea is not simply the baby does not touch it. The idea is:

• the mother puts the robe in the chest
• so that the baby will not touch it

So ne means so that ... not or lest.

Compare:

• non tangit = does not touch (simple statement)
• ne tangat = so that he/she does not touch, lest he/she touch

This is a very common Latin structure:

• ut + subjunctive = positive purpose
• ne + subjunctive = negative purpose

Because it is inside a purpose clause introduced by ne.

In Latin, purpose clauses normally use:

• ut + subjunctive = in order that
• ne + subjunctive = in order that ... not

So:

• tangat is present subjunctive
• it comes from tango, tangere = to touch

The sentence is not saying the baby actually touches the robe. It expresses the mother's purpose in putting it away.

Because infans here is grammatically singular. Verb agreement depends on number (and person), not on biological sex.

So:

• infans = the baby/child (singular)
• tangat = may touch (3rd person singular subjunctive)

The noun infans can refer to either a male or female child, but the verb stays singular either way.

Infans is nominative singular because it is the subject of tangat.

In the clause ne infans eam tangat:

• infans = the baby = the one who might do the touching
• eam = it = the thing that might be touched
• tangat = might touch

So infans must be nominative.

Latin word order is much more flexible than English word order because case endings show each word’s role.

So all of these core relationships are clear from the endings:

• mater = subject
• stolam = object
• in arca = location
• ponit = main verb

Putting mater first is natural because it introduces the topic or actor first: Mother puts the robe away...

Also, placing ne infans eam tangat after the main clause makes the purpose clear at the end: ...so that the baby won’t touch it.

So the order is natural and clear, but not as rigid as in English.

Sometimes Latin can leave out an object if the meaning is obvious, but here eam is helpful and natural because it clearly points back to stolam.

Without eam, ne infans tangat would mean simply so that the baby may not touch, and the reader would have to infer touch what? from context. Latin often prefers to make that explicit when the object is important.

So eam neatly ties the second clause back to stolam.

Ponit is present indicative active, third person singular, from pono, ponere.

It means she puts or is putting.

Latin often uses the present tense in simple example sentences like this to describe a normal action or a scene:

• Mater ... ponit = Mother puts ...

The purpose clause also uses the present subjunctive (tangat) because it is tied to the present-time main verb.

The sentence has two parts:

1. Main clause
   Mater stolam in arca ponit
   = Mother puts the robe in the chest

2. Negative purpose clause
   ne infans eam tangat
   = so that the baby may not touch it

So the overall pattern is:

main clause + ne + subjunctive

This is a very useful Latin pattern to recognize:

• He hides the letter so that no one may read it
• She closes the door so that the child may not go out
• Mother puts the robe in the chest so that the baby may not touch it