Ми чекаємо електрика, навіть якщо аварійне освітлення працює.

Here it means the electrician.

Why it can be confusing:

• електрик = electrician
• електрика can also be a separate noun in some contexts, meaning electrics / electrical wiring

But in this sentence, електрика is the object form of електрик, so the meaning is clearly electrician.

Because the noun is not the subject of the sentence; it is the person being waited for.

With чекати, standard Ukrainian traditionally uses the genitive:

• чекати кого? чого?

So:

• електрик → електрика

Also, for a masculine animate noun like електрик, the accusative singular looks the same as the genitive singular, so the form електрика is exactly what you expect here.

Yes, you can.

Both patterns are used:

• чекати електрика
• чекати на електрика

The version without на is very standard and natural. The version with на is also common in everyday speech. Both can mean to wait for the electrician.

навіть якщо means even if.

Compare:

• якщо = if
• навіть якщо = even if

So this phrase adds the idea that the main action is still true regardless of that condition:

• Ми чекаємо електрика, навіть якщо аварійне освітлення працює.
• We are still waiting for the electrician, regardless of whether the emergency lighting is working.

Because хоча and навіть якщо are close, but not identical.

• хоча = although / even though
• навіть якщо = even if

A simple way to feel the difference:

• хоча usually presents something as a fact
• навіть якщо presents it more as a condition or possibility

So навіть якщо аварійне освітлення працює means even if the emergency lighting is working, with a stronger conditional flavor.

Because adjectives must agree with the noun in gender, number, and case.

Here:

• освітлення is neuter singular
• so the adjective must also be neuter singular
• therefore: аварійне

So:

• аварійне = neuter singular form of аварійний
• освітлення = lighting

Together, аварійне освітлення means emergency lighting.

Because the subject is singular:

• аварійне освітлення

That whole phrase is one singular noun phrase, so the verb is singular too:

• працює = works / is working

If the subject were plural, you would use:

• працюють

It can mean either, depending on context.

Ukrainian present tense usually does not make the same clear grammar distinction that English does between:

• works
• is working

So аварійне освітлення працює can mean:

• the emergency lighting works
• the emergency lighting is working

The situation tells you which English version sounds best.

Because навіть якщо аварійне освітлення працює is a subordinate clause.

Ukrainian normally separates a main clause and a subordinate clause with a comma:

• Ми чекаємо електрика, навіть якщо аварійне освітлення працює.

This is very normal punctuation in Ukrainian.

Not strictly.

The verb чекаємо already tells you the subject is we, because it is first person plural.

So both are possible:

• Ми чекаємо електрика...
• Чекаємо електрика...

Including ми can add:

• emphasis
• clarity
• contrast

So ми is natural, but not always necessary.

Ukrainian has no articles like English a / an / the.

So електрика can mean:

• an electrician
• the electrician

The exact meaning comes from context.

In this sentence, the context makes it sound like a specific person the speakers are expecting, so English naturally uses the electrician.

No, Ukrainian word order is fairly flexible.

The given version is neutral and natural:

• Ми чекаємо електрика, навіть якщо аварійне освітлення працює.

But you could also put the condition first:

• Навіть якщо аварійне освітлення працює, ми чекаємо електрика.

That version shifts the emphasis a little, but the basic meaning stays the same.