Ĉi tiu evento estas por la tuta urbo.

Ĉi tiu means this.

It is built from:

• tiu = that / that one
• ĉi = a little particle that brings the meaning closer, giving this

So:

• tiu evento = that event
• ĉi tiu evento = this event

In modern Esperanto, ĉi tiu is the normal way to say this before a noun.

In Esperanto, nouns normally end in -o.

So:

• evento = event
• urbo = city

This is one of the most basic patterns in the language:

• -o = noun
• -a = adjective
• -e = adverb
• -i = infinitive verb

Because evento is a noun, it ends in -o.

Estas is the present-tense form of esti, which means to be.

So:

• mi estas = I am
• vi estas = you are
• ĝi estas = it is

Esperanto verbs do not change depending on the subject. The present tense is always -as.

That means:

• mi estas
• li estas
• ili estas

all use the same verb form estas.

Por usually means for.

In this sentence, it means something like:

• intended for
• meant for
• for the benefit of

So Ĉi tiu evento estas por la tuta urbo means the event is intended for the whole city, not just for one group.

Compare:

• Tio estas por vi. = That is for you.
• La donaco estas por mia amiko. = The gift is for my friend.

La tuta urbo means the whole city or the entire city.

Breakdown:

• la = the
• tuta = whole / entire
• urbo = city

The adjective tuta ends in -a because adjectives in Esperanto end in -a.

Also, adjectives agree with nouns, so both are singular here:

• tuta urbo not
• tutaj urbo

because urbo is singular.

Because urbo is not the direct object here.

The -n ending is usually used for:

• direct objects
• motion toward something in some cases

But in this sentence, urbo comes after the preposition por. Prepositions like por normally take the basic form, without -n.

So:

• por la urbo = correct
• por la urbon = not correct here

Yes. In Esperanto, adjectives agree with the nouns they describe.

That means they match in:

• number: singular or plural
• case: whether there is an -n ending

Here:

• tuta is singular
• urbo is singular

So they match.

Examples:

• la tuta urbo = the whole city
• la tutaj urboj = the whole cities / all the cities
• mi vidas la tutan urbon = I see the whole city

Notice how the adjective changes along with the noun:

• singular: tuta urbo
• plural: tutaj urboj
• accusative: tutan urbon

Yes, Esperanto has fairly flexible word order, but the given version is the most natural and straightforward.

Normal order:

• Ĉi tiu evento estas por la tuta urbo.

You could also sometimes hear variations for emphasis, but beginners should stick with the standard pattern:

• subject: Ĉi tiu evento
• verb: estas
• prepositional phrase: por la tuta urbo

Because Esperanto uses endings clearly, word order can move more than in English, but not every possible order sounds equally natural.

Evento is a normal Esperanto word, and it is easy for many learners to recognize because it resembles the English word event.

A different word might be possible in some contexts, such as okazaĵo, but the nuance can differ:

• evento = event
• okazaĵo = occurrence, happening, event

In many everyday contexts, evento works very well, especially for public events, organized activities, or announcements.

The presence of la makes the phrase definite.

• tuta urbo = a whole city / an entire city
• la tuta urbo = the whole city

In your sentence, la tuta urbo means a specific city is being referred to, and the event is for all of it.

So the sentence is not saying just for some entire city in general, but for the whole city that the speaker has in mind.

A rough guide for an English speaker:

• Ĉ sounds like ch in church
• ŭ sounds like a short w-glide
• tiu is roughly TEE-oo
• evento is roughly eh-VEN-to
• estas is roughly ES-tas
• por is roughly por
• tuta is roughly TOO-ta
• urbo is roughly OOR-bo

So a rough pronunciation is:

chee TEE-oo eh-VEN-to ES-tas por la TOO-ta OOR-bo

Also remember that Esperanto stress normally falls on the second-to-last syllable:

• eVENto
• EStas
• TUta
• URbo

Usually, yes, or at least that is the idea being communicated.

Por la tuta urbo suggests:

• the event is meant for the whole city
• it is not limited to a small group
• it is open or relevant to all city residents

Depending on context, it could mean:

• everyone is welcome
• the event is intended to benefit the whole city
• the event serves the entire community

So the exact nuance depends on context, but the general idea is broad inclusion.