Noli foras exire, quia glacies adhuc in via manet.

Noli is a very common way to give a negative command in Latin.

• noli + infinitive = do not ... (to one person)
• nolite + infinitive = do not ... (to more than one person)

So:

• Noli exire = Don’t go out
• Nolite exire = Don’t go out (said to several people)

This is one of the standard beginner patterns for negative commands. Latin does have other ways to express prohibition, but noli/nolite + infinitive is the one learners meet most often first.

Noli is the singular imperative of nolo, nolle, nolui, which means to be unwilling or to not want.

Literally, noli exire is something like:

• be unwilling to go out

But in normal English, it simply means:

• don’t go out

So the structure is grammatically built from nolo plus an infinitive, but idiomatically it functions as a negative command.

Because after noli, Latin normally uses an infinitive.

So:

• noli + infinitive
• nolite + infinitive

Here:

• exire = to go out
• noli exire = don’t go out

This is just the standard construction, so the infinitive is exactly what you should expect after noli.

Foras means outside, out of doors, or to the outside. It is an adverb.

Meanwhile, exire means to go out or to go forth.

So the two words overlap a bit:

• exire already contains the idea of going out
• foras adds the idea of outside/outdoors

Together, foras exire is a very natural Latin expression meaning something like:

• to go outside
• to go out of the house
• to go outdoors

It is not necessarily redundant in a bad way; it is simply idiomatic and clear.

Yes. Noli exire would already mean Don’t go out.

Adding foras makes the direction more explicit:

• Noli exire = Don’t go out
• Noli foras exire = Don’t go outside / Don’t go out outdoors

So foras is not required, but it sharpens the meaning.

Glacies is the subject of manet, so it is in the nominative singular.

• glacies = ice
• manet = remains / stays

So:

• glacies ... manet = the ice remains ...

A learner may notice that glacies ends in -es, which can look plural at first. But here it is actually singular.

Glacies, glaciei is a feminine fifth-declension noun.

That is useful because many learners first associate -es with plurals or with third-declension forms, so glacies can be surprising.

Basic form:

• nominative singular: glacies
• genitive singular: glaciei

In this sentence, it is nominative singular because it is the subject of manet.

Adhuc means still, up to this point, or sometimes yet depending on context.

Here it means:

• still

So:

• glacies adhuc in via manet = the ice is still on the road

It tells you the condition has not changed yet.

Because in takes different cases depending on whether it shows location or motion.

• in + ablative = in/on a place, with no movement
• in + accusative = into/onto a place, with movement toward it

Here the meaning is location:

• the ice remains on the road

So Latin uses:

• in via (ablative)

If it meant movement, you would expect the accusative:

• in viam = into the road / onto the road

Via means road, street, or way.

In this sentence, in via most naturally means:

• on the road
• in the street

The exact English wording depends on context, but grammatically it is simply the location where the ice remains.

Manet comes from maneo, manere, meaning remain, stay, or continue to be.

So:

• glacies in via est would mean the ice is on the road
• glacies in via manet means the ice remains on the road / the ice is still there on the road

Using manet emphasizes that the ice is still there, which fits well with adhuc.

Manet is:

• third person singular
• present tense
• active voice
• from maneo, manere

So it means:

• he/she/it remains
• here: it remains, referring to glacies

Because glacies is singular, the singular verb manet is required.

Quia is a very common conjunction meaning because.

So the sentence is divided like this:

• Noli foras exire = main command
• quia glacies adhuc in via manet = reason clause

Together:

• Don’t go outside, because the ice is still on the road.

Latin also has other words that can introduce causal clauses, but quia is straightforward and common.

Latin word order is much more flexible than English word order because the endings show grammatical function.

So:

• Noli foras exire, quia glacies adhuc in via manet
• Noli foras exire, quia adhuc glacies manet in via
• and other variations

could all be understandable, though not equally natural.

In this sentence, the order is quite readable and natural:

• command first
• reason second
• subject glacies before the verb manet

The verb often comes late in Latin, though that is not a rigid rule.

You would change noli to nolite:

• Nolite foras exire, quia glacies adhuc in via manet.

That means:

• Don’t go outside, because the ice is still on the road.
  (said to more than one person)

Everything else stays the same.