Ο αδερφός μου πήρε ξυριστική μηχανή για το ταξίδι, αλλά ξέχασε το αποσμητικό στο σπίτι.

In Greek, the usual way to say my brother is:

• ο αδερφός μου

The possessive word μου usually comes after the noun, not before it as in English.

So:

• ο αδερφός μου = my brother
• literally: the brother my

This is completely normal Greek word order for possession.

You may sometimes see other word orders for emphasis in more complex sentences, but for a basic phrase, ο αδερφός μου is the standard form.

Greek normally keeps the definite article with family members and many possessed nouns.

So Greek says:

• ο αδερφός μου = literally the brother of me
• η μητέρα μου = my mother
• το σπίτι μου = my house

This is one of the big differences from English: in Greek, the article is often still used even when there is a possessive like μου.

Both πήρε and ξέχασε are in the aorist past tense.

In this sentence, the aorist is used because both actions are seen as completed events:

• πήρε = he took / got
• ξέχασε = he forgot

This is the normal tense for telling a sequence of past actions in Greek.

If Greek wanted to emphasize an ongoing or repeated past action, it would use a different past form, often the imperfect. But here the idea is simple: one action happened, and another action happened.

This is a very common question.

• πήρε ξυριστική μηχανή = he took/got a razor/electric shaver
• ξέχασε το αποσμητικό = he forgot the deodorant

Greek does not have a separate word for a/an in the same way English does. So an indefinite idea can appear without an article:

• πήρε ξυριστική μηχανή = he took a shaver

But when something is definite or specific, Greek uses the definite article:

• το αποσμητικό = the deodorant

So the contrast is:

• no article → often a/an, or a non-specific item
• definite article → the, something specific

Yes. ξυριστική μηχανή is a noun phrase made of:

• ξυριστική = an adjective
• μηχανή = machine

Literally, it means something like:

• shaving machine

In natural English, that becomes electric shaver, shaver, or razor, depending on context.

The adjective ξυριστική agrees with μηχανή, which is feminine singular, so both words are in the feminine singular form.

It functions here as a noun, meaning deodorant.

Historically, αποσμητικό comes from an adjective-like form, but in everyday Greek it is commonly used on its own as a noun:

• το αποσμητικό = the deodorant

This is very common in Greek: a word that looks adjective-like can be used as a noun when the meaning is understood.

Its article is το, so it is treated as a neuter singular noun.

Για is a preposition, and here it means for.

After για, Greek uses the accusative case:

• για το ταξίδι = for the trip

So:

• το ταξίδι is accusative singular
• the noun ταξίδι is neuter, and in this case the nominative and accusative forms look the same

The article το also matches a neuter singular noun.

Both are possible, but they mean slightly different things.

• για το ταξίδι = for the trip → a specific trip
• για ταξίδι = for a trip / for traveling → more general

In your sentence, για το ταξίδι suggests a particular trip that is already known in context.

So the article helps make the trip specific.

Στο is a contraction of:

• σε + το = στο

So:

• σε = in / at / to
• το = the
• στο = in the / at the / to the

Therefore:

• στο σπίτι = in the house / at the house / at home

In this sentence, the natural English translation is usually at home or at the house.

Greek often uses the article where English would not.

So:

• στο σπίτι literally = in/at the house
• but in natural English this often becomes simply at home

Greek commonly says:

• πάω στο σπίτι = I’m going home
• είμαι στο σπίτι = I’m at home

So even when English drops the article or uses a special expression like home, Greek often keeps το σπίτι.

After σε (and therefore after στο), the noun is in the accusative.

So in:

• στο σπίτι

the noun σπίτι is accusative singular.

Because σπίτι is a neuter noun, its nominative and accusative forms are the same, so you do not see a change in the noun itself.

Greek word order is more flexible than English word order.

The basic sentence:

• Ο αδερφός μου πήρε ξυριστική μηχανή για το ταξίδι, αλλά ξέχασε το αποσμητικό στο σπίτι.

is perfectly natural.

But Greek can move parts around for emphasis, for example:

• Το αποσμητικό το ξέχασε στο σπίτι.
• Για το ταξίδι πήρε ξυριστική μηχανή.

That said, not every word order sounds equally neutral. The original version is a normal, straightforward way to say it.

Yes, αλλά is the normal Greek word for but.

In this sentence it connects two contrasting ideas:

• he took one useful item for the trip
• but he forgot another one at home

So:

• ..., αλλά ... = ..., but ...

It is a very common coordinating conjunction.

Both exist.

• αδερφός is very common in everyday modern Greek
• αδελφός is a more conservative or formal form, and it also appears in religious or more formal language

A learner will hear and see αδερφός very often in everyday speech, so the form in your sentence is completely normal.

It can depend on context.

Παίρνω / πήρε has a broad meaning range, including:

• take
• get
• sometimes buy, depending on the situation

In this sentence, if the context is packing for a trip, πήρε ξυριστική μηχανή most naturally means:

• he took a shaver with him
• or he packed a shaver

If the wider context were shopping, it might mean he bought a shaver, but that is less likely here because of για το ταξίδι and the contrast with forgetting something at home.

Greek often leaves that idea implicit because the verb πήρε already makes it clear enough in context.

So:

• πήρε ξυριστική μηχανή για το ταξίδι

naturally suggests that he took/packed a shaver for the trip.

Greek does not always need to spell out every part that English might choose to express. The context fills in the rest.

Yes, the subject is masculine because:

• ο αδερφός is a masculine noun meaning brother

However, the verb forms πήρε and ξέχασε themselves do not change for grammatical gender in this tense. They simply mean he/she forgot, he/she took, depending on the subject.

So the masculine meaning comes from the noun ο αδερφός, not from the verb ending itself.