Nihil nos impediet quominus postero die ad fanum redeamus, si via tuta erit.

Because impediet is a transitive verb here: nihil nos impediet = nothing will hinder us.

So:

• nihil = the subject, nothing
• nos = the direct object, us
• impediet = will hinder / will prevent

English often says prevent us from..., and Latin expresses that with impedire + object + quominus clause.

After verbs of hindering, preventing, or delaying, Latin very often uses quominus + subjunctive.

So:

• impedire = to hinder / prevent
• quominus redeamus = from returning / that we should not return

In smoother English, the whole structure means:

• nihil nos impediet quominus redeamus
  = nothing will prevent us from returning

A learner may expect an infinitive, but Latin normally prefers this clause after verbs like impedio.

It is subjunctive because it is inside the quominus clause.

After impedire and similar verbs, Latin uses:

• quominus
  • subjunctive

So redeamus is not an independent statement like we are returning. It is part of the idea prevent us from returning.

Here redeamus is present subjunctive, active, first person plural, from redeo, redire.

Because after quominus, Latin uses the subjunctive, and the tense of the subjunctive does not work exactly like English future wording.

Here the present subjunctive is normal after a future main verb:

• nihil nos impediet quominus redeamus
  = nothing will prevent us from returning

The future sense comes mainly from the main verb impediet and from the context, not from making redeamus itself future.

Postero die is ablative of time when.

• postero = on the following / next
• die = day

So literally it means:

• on the following day
• or more naturally, the next day

Latin often uses the ablative without a preposition to express when something happens.

Because ad with the accusative shows motion toward a place.

• ad = to, toward
• fanum = accusative singular
• ad fanum = to the shrine/temple

Since redeamus means let us go back / return, Latin marks the destination with ad.

Fanum means a sanctuary, shrine, holy place, or temple. It is a religious place, but not always exactly the same in nuance as templum.

Very roughly:

• fanum emphasizes a sacred precinct or shrine
• templum can mean a temple, and originally also a space marked out for religious observation

In many basic translations, fanum can simply be rendered temple or shrine.

Because this is a future more vivid condition:

• si via tuta erit = if the road is safe
• nihil nos impediet = nothing will prevent us

Both verbs are future:

• erit = will be
• impediet = will hinder

Latin often uses future + future where English may still translate naturally with a present in the if clause:

• Latin: si via tuta erit
• English: if the road is safe

So the Latin is more explicitly future than the English.

The sentence breaks down like this:

• Nihil = subject
• nos impediet = main verb + direct object
• quominus ... redeamus = clause depending on impediet
• postero die = time expression
• ad fanum = motion toward a place
• si via tuta erit = condition

So the structure is:

• Nothing will prevent us
• from returning to the shrine on the next day
• if the road is safe

Seeing the sentence in chunks often makes it much easier to read.

Here nihil is best taken as the neuter pronoun meaning nothing.

So:

• nihil nos impediet = nothing will hinder us

It is functioning as the subject of the verb. Although nihil can sometimes be used adverbially in other contexts, here it is clearly the subject.

Yes. You may see both:

• quominus
• quo minus

They are the same expression historically and function the same way in this kind of sentence. Many texts and dictionaries treat the one-word form as standard, but learners should recognize both.

So if you see:

• impedit quo minus veniat

that is the same basic construction as:

• impedit quominus veniat

Because with verbs of hindering/preventing, Latin usually prefers quominus or sometimes ne, rather than ut non.

So after impedio, detineo, prohibeo, and similar verbs, the expected construction is often:

• quominus
  • subjunctive

That is why quominus redeamus sounds natural in Latin.

For a learner, it is best to memorize this as a standard pattern:

• aliquem impedire quominus + subjunctive
  = to prevent someone from ...

It comes from redeo, redire, redii (or redivi), reditum: to go back, return.

Here:

• re- = back
• eo = I go

So redeamus literally means may we go back or let us return, but in this sentence it is simply part of the dependent clause after quominus: from returning.