Odezwij się jutro.

It means something like Get in touch tomorrow, Contact me tomorrow, or Reach out tomorrow.

The verb odezwać się / odezwij się is fairly broad. Depending on context, it could mean:

• call
• text
• write
• message
• say something / speak up

So the sentence does not specify the method of contact.

In Polish, the person you should contact is often understood from context, so it does not have to be stated.

So Odezwij się jutro can naturally mean Get in touch with me tomorrow even though me is not literally present.

If you want to make it explicit, you can say:

• Odezwij się do mnie jutro = Get in touch with me tomorrow

Odezwij is the 2nd person singular imperative form of odezwać się.

That means it is used when speaking directly to one person in an informal way:

• odezwać się = infinitive
• odezwij się = get in touch / speak up (to one person)

So this is the kind of form you would use with a friend, sibling, partner, child, etc.

Because the full verb is odezwać się, not just odezwać.

In other words, się is part of the verb expression. You should learn it together as one unit:

• odezwać się = to get in touch / to speak up

Here, się does not mean yourself in the straightforward English sense. It is just a normal part of many Polish verbs.

So:

• Odezwij się jutro = correct
• Odezwij jutro = not correct for this meaning

This is a question of aspect.

• odezwać się is perfective
• odzywać się is imperfective

In an imperative, the perfective form often means do it once / make sure the action happens.

So:

• Odezwij się jutro = Get in touch tomorrow (one completed action)

By contrast:

• Odzywaj się can mean keep in touch, do stay in touch, or speak up from time to time, depending on context

So in this sentence, odezwij się is the natural choice because it refers to one specific future action.

It is informal singular.

You are saying it to one person you address as ty.

Other versions include:

• Odezwijcie się jutro = informal, to more than one person
• Proszę odezwać się jutro = polite/formal
• Niech pan odezwie się jutro = formal, to a man
• Niech pani odezwie się jutro = formal, to a woman

So Odezwij się jutro would usually be too direct for a stranger or in a very formal situation.

No. It only says make contact.

That is why it can translate in different ways depending on context:

• call tomorrow
• text tomorrow
• write tomorrow
• get in touch tomorrow

If you want to be specific, Polish usually uses a more specific verb:

• Napisz jutro = Write tomorrow / Text tomorrow
• Zadzwoń jutro = Call tomorrow

Because jutro already means tomorrow and works here by itself.

It is functioning like an adverb of time, so you do not need anything like on or in.

Compare:

• Odezwij się jutro = Get in touch tomorrow
• English also says tomorrow without a preposition

So this part is actually quite similar to English.

Yes, Polish word order is flexible, but not every order sounds equally natural.

The most neutral version is:

• Odezwij się jutro

You can also say:

• Jutro się odezwij

This puts more emphasis on tomorrow.

What usually stays true is that się remains close to the verb. So learners should treat odezwij się as a chunk.

Yes. In some contexts, odezwij się! can mean Say something! or Speak up!

So the verb has a wider range than just contact someone.

But with jutro, and in everyday conversation, the most likely meaning is:

• Get in touch tomorrow

That is the sense learners should understand first.