Mater lucernam accendit, ut lumen in atrio sit.

Mater is the subject of accendit, so it is in the nominative singular.

Its dictionary form is already mater, so the subject form does not change here. Latin often shows who is doing the action by the noun ending, not by word order alone.

Latin has no articles. There is no separate word for the, a, or an.

So mater can mean mother, a mother, or the mother, depending on the context. The same is true for lucernam, lumen, and atrium.

Because lucernam is the direct object of accendit: it is the thing being lit.

The noun is lucerna, a first-declension noun. Its accusative singular form is lucernam. So the ending -am tells you that this noun receives the action.

Here accendit is third person singular, present indicative active from accendere, meaning to light or to kindle.

So it means she lights or he/she is lighting. In this sentence, the subject is mater, so the sense is mother lights.

A useful extra point: accendit can sometimes also be a perfect form in Latin, but in this sentence the following ut ... sit clause makes the present reading the natural one.

It is a purpose clause.

Ut + the subjunctive often means so that or in order that. So the mother lights the lamp for a purpose: so that there may be light in the atrium.

Because after ut in a purpose clause, Latin normally uses the subjunctive, not the indicative.

So:

• est = is
• sit = may be / might be

Here sit shows the intended result or purpose, not just a plain statement of fact.

Latin usually follows sequence of tenses in subordinate clauses like purpose clauses.

Since accendit is a present main verb, the purpose clause normally uses the present subjunctive: sit. This gives the sense so that light may be in the atrium.

If the main verb were in a past tense, Latin would often use the imperfect subjunctive instead.

Lumen is the subject of sit, so it is in the nominative singular.

Even though it comes after ut, it is still the thing that may be in the atrium. In other words, lumen is not the object of accendit; lucernam is.

Because in takes different cases depending on meaning:

• in + ablative = in / on with location
• in + accusative = into / onto with motion toward

Here the meaning is location: the light is in the atrium, not moving into the atrium. So Latin uses the ablative: in atrio.

English often uses a dummy there: there is light. Latin usually does not do that.

Instead, Latin simply says something like light is in the atrium. So ut lumen in atrio sit is literally so that light may be in the atrium, which English often translates more naturally as so that there may be light in the atrium.

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

This sentence puts the main clause first and the purpose clause after it, which is very natural: Mater lucernam accendit, ut lumen in atrio sit.

But other arrangements are possible, especially for emphasis. For example, moving in atrio earlier could emphasize the place. The exact word order often adds nuance rather than changing the basic grammar.