La meva germana s'aixeca aviat cada dia, també diumenge.

In Catalan, it is very common to use the definite article with possessives:

• la meva germana = my sister
• el meu pare = my father
• la nostra casa = our house

So la meva germana is the normal beginner-friendly pattern to learn.

s' is the shortened form of es, a clitic pronoun used with many pronominal/reflexive verbs.

• es aixeca becomes s'aixeca before a vowel

So:

• s'aixeca = es aixeca

The apostrophe is there because es loses its e before aixeca.

This is one of the most useful things to notice in the sentence.

• aixecar can mean to raise / lift
• aixecar-se means to get up / to stand up

So:

• La meva germana aixeca la cadira. = My sister lifts the chair.
• La meva germana s'aixeca. = My sister gets up.

In English, we often use a completely different verb, but in Catalan the pronoun helps create that meaning.

It is the present indicative, third person singular.

Because the subject is la meva germana, the meaning is she gets up.

In this sentence, the present tense expresses a habit or routine:

• s'aixeca aviat cada dia = she gets up early every day

That matches how English uses the simple present for habits.

It can mean either, depending on context.

Here, with getting up, it means early:

• s'aixeca aviat = gets up early

In other contexts, aviat can mean soon:

• Tornaré aviat. = I’ll come back soon.

So the context tells you which English word fits best.

Because cada takes a singular noun in Catalan, just like each in English.

• cada dia = every day / each day
• not cada dies

Another common way to say every day is:

• tots els dies

So both of these can work:

• cada dia
• tots els dies

Catalan often does not use a preposition like English on before days of the week.

So:

• diumenge can mean Sunday or on Sunday, depending on context

In this sentence:

• també diumenge = also on Sunday / Sunday too

That is very normal in Catalan time expressions.

també means also or too.

Here it adds emphasis to the idea that the routine includes Sunday:

• cada dia, també diumenge = every day, Sunday too

So the sentence is not just saying she gets up early every day; it is highlighting that this is true even on Sunday.

If you wanted to make that idea even stronger, Catalan often uses:

• fins i tot diumenge = even on Sunday

The comma separates the final part as an extra comment or emphasis.

So:

• La meva germana s'aixeca aviat cada dia, també diumenge.

feels a bit like:

• My sister gets up early every day — Sunday too.

It helps the last part sound like an added reminder or emphasis. Without the comma, the sentence would still be understandable, but the pause makes the meaning more expressive.