Čak i ako bude vruće, moramo uzeti crijevo i zaliti živicu kraj ograde.

Ako means if.

Čak i ako means even if, so it adds a stronger concessive idea: the action in the main clause still happens regardless of that condition.

• Ako bude vruće... = If it is hot...
• Čak i ako bude vruće... = Even if it is hot...

So čak i strengthens the condition.

After ako, Croatian usually uses bude for a future possible condition.

So:

• ako bude vruće = if it is / turns out to be hot
• ako je vruće usually sounds more like a present or general condition
• ako će biti vruće is generally not the normal choice here

This is a very common Croatian pattern:

• Ako bude kiše...
• Ako bude vremena...
• Ako bude hladno...

So the sentence is following a standard future-condition structure.

Here vruće is part of an impersonal weather expression.

Croatian often uses a neuter-looking predicative form for weather and general conditions:

• hladno je = it is cold
• toplo je = it is warm
• vruće je = it is hot

So in bude vruće, there is no real subject like English it. Croatian simply says, literally, something like is hot.

Because Croatian usually drops subject pronouns when the verb ending already shows who the subject is.

• moram = I must
• moraš = you must
• moramo = we must

So moramo already means we must. Adding mi is possible, but only if you want extra emphasis or contrast.

• Moramo uzeti crijevo. = We have to take the hose.
• Mi moramo uzeti crijevo. = We have to take the hose.

In Croatian, the present tense is often used for obligations, plans, or actions that are understood from context to be current or upcoming.

So moramo uzeti crijevo can mean:

• we have to take the hose
• we’ll have to take the hose

The future meaning is already suggested by the condition ako bude vruće. Because of that, Croatian does not always need a future form in the main clause.

If you wanted to make the future more explicit, you could also say:

• morat ćemo uzeti crijevo

But moramo is completely natural here.

Because after the modal verb morati, Croatian normally uses the infinitive.

• moramo uzeti = we must take
• moramo zaliti = we must water

In this sentence, one moramo governs both infinitives:

• moramo uzeti crijevo i zaliti živicu

That means:

• we must take the hose and water the hedge

Croatian does not need to repeat moramo before the second verb.

Here crijevo means hose, specifically a garden hose from the context.

It is in the accusative case because it is the direct object of uzeti.

The dictionary form is also crijevo, and because it is a neuter singular noun, nominative and accusative are the same:

• nominative: crijevo
• accusative: crijevo

A useful note: crijevo can also mean intestine/gut in other contexts, but here the meaning is clearly hose.

This is about verbal aspect.

• zaliti is perfective
• zalijevati is imperfective

In this sentence, zaliti is used because the speaker is talking about one complete action: watering the hedge as a task to be done.

So:

• zaliti živicu = water the hedge once, as a complete action
• zalijevati živicu = be watering / water regularly / water repeatedly

Because the sentence is about a single necessary action, the perfective zaliti fits well.

Because živicu is the accusative singular of živica.

• dictionary form: živica = hedge
• accusative singular: živicu

It is accusative because it is the direct object of zaliti:

• zaliti što? → živicu

This is a very common pattern with feminine nouns ending in -a:

• kuća → kuću
• ograda → ogradu
• živica → živicu

Here kraj is a preposition meaning by, beside, or near.

As a preposition, kraj takes the genitive case, so:

• ograda = fence
• ograde = of the fence / by the fence, depending on context

So:

• kraj ograde = by the fence / near the fence

Important: this is not the noun kraj meaning end. It is the preposition kraj.

Yes, Croatian word order is fairly flexible.

The sentence begins with Čak i ako bude vruće because that condition is being highlighted first.

You could also say something like:

• Moramo uzeti crijevo i zaliti živicu kraj ograde čak i ako bude vruće.

That is still understandable, but it gives the sentence a slightly different rhythm and emphasis.

Putting the conditional clause first is very natural when you want to frame the whole statement with that condition.

Because Čak i ako bude vruće is a subordinate clause, and it is followed by the main clause:

• subordinate clause: Čak i ako bude vruće
• main clause: moramo uzeti crijevo i zaliti živicu kraj ograde

Croatian normally separates this kind of clause with a comma.

So the comma is standard punctuation here.