Η φίλη μου ιδρώνει εύκολα όταν έχει πολλή ζέστη στο λεωφορείο.

Greek often uses the definite article with possessives, so η φίλη μου is the normal way to say my friend.

Literally, it looks like:

• η = the
• φίλη = female friend
• μου = my

So Greek structure is often closer to the friend of mine than to English my friend.

You can sometimes hear φίλη μου without the article, but that is often more direct or emotional, like when addressing someone: Φίλη μου, άκου... = My friend, listen...

It can mean either, depending on context.

• η φίλη μου can mean my female friend
• It can also mean my girlfriend

If the meaning has already been given to the learner, then that settles it in this sentence. But grammatically, Greek does not always force the distinction.

Also note:

• φίλος = male friend / boyfriend
• φίλη = female friend / girlfriend

So the noun tells you the gender of the person being talked about.

In Greek, unstressed possessive forms like μου, σου, του, της, μας usually come after the noun.

So:

• η φίλη μου = my friend
• το βιβλίο μου = my book
• η μητέρα της = her mother

This is just the normal Greek pattern.

Ιδρώνει is the third person singular present tense of ιδρώνω, meaning to sweat.

So:

• ιδρώνω = I sweat / I am sweating
• ιδρώνεις = you sweat
• ιδρώνει = she/he/it sweats

Here it matches η φίλη μου, so:

• Η φίλη μου ιδρώνει = My friend sweats

In this sentence, the present tense expresses a habitual or general fact: she tends to sweat easily in those conditions.

Yes. Εύκολα is an adverb meaning easily.

It modifies the verb ιδρώνει, telling us how she sweats:

• ιδρώνει εύκολα = she sweats easily

This is different from the adjective εύκολος / εύκολη / εύκολο, which means easy.

Compare:

• Είναι εύκολο. = It is easy.
• Το κάνει εύκολα. = She does it easily.

Because έχει ζέστη is a very common Greek weather expression meaning it’s hot.

Literally, έχει πολλή ζέστη is something like there is a lot of heat, but naturally it means:

• it is very hot
• there is a lot of heat

Greek often uses έχει with weather-like conditions:

• έχει ζέστη = it’s hot
• έχει κρύο = it’s cold
• έχει αέρα = it’s windy
• έχει υγρασία = it’s humid

So this is an idiomatic pattern you should learn as a chunk.

Because πολλή is agreeing with the noun ζέστη, which is feminine singular.

Here, πολλή comes from πολύς, πολλή, πολύ and means much / a lot of:

• πολλή ζέστη = a lot of heat

Since ζέστη is feminine, Greek uses the feminine form:

• masculine: πολύς
• feminine: πολλή
• neuter: πολύ

A very useful contrast:

• πολλή ζέστη = a lot of heat / very hot
• πολύ ζεστό = very hot if modifying an adjective
• ιδρώνει πολύ = she sweats a lot because here πολύ is an adverb

So in this sentence, πολλή is not an adverb; it is an adjective-like form agreeing with ζέστη.

This is an impersonal expression.

In English we say it’s hot, where it does not refer to a real thing. Greek often uses έχει in the same kind of impersonal way:

• Όταν έχει πολλή ζέστη... = When it’s very hot...

There is no explicit subject because Greek does not need one here. The idea is simply when there is a lot of heat.

Όταν means when, and in sentences like this it often has the sense of whenever.

So:

• όταν έχει πολλή ζέστη can mean when it’s very hot
• in context, it can also imply whenever it gets very hot

Because the whole sentence describes a repeated tendency, English might naturally translate it as:

• My friend sweats easily when it’s very hot on the bus
• or ...whenever it’s very hot on the bus

Στο is the contracted form of σε + το.

So:

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

Therefore:

• στο λεωφορείο = on the bus / in the bus

With transport, English usually says on the bus, but Greek uses σε very naturally here.

This kind of contraction is extremely common:

• στο = σε το
• στη = σε τη(ν)
• στον = σε τον
• στα = σε τα

Because λεωφορείο is a neuter noun.

Its basic singular forms are:

• το λεωφορείο = the bus
• του λεωφορείου = of the bus
• στο λεωφορείο = on/in the bus

Many Greek neuter nouns end in -ο or -ι, and λεωφορείο is one of them.

Not completely. Greek word order is more flexible than English, although some orders sound more neutral than others.

The given sentence:

• Η φίλη μου ιδρώνει εύκολα όταν έχει πολλή ζέστη στο λεωφορείο.

is a natural, neutral order.

You could move some parts for emphasis, for example:

• Όταν έχει πολλή ζέστη στο λεωφορείο, η φίλη μου ιδρώνει εύκολα.

This puts more focus on the condition first: When it’s very hot on the bus...

So the meaning stays basically the same, but the emphasis changes.

Yes, and that is a good thing to notice.

In this sentence, στο λεωφορείο most naturally connects with έχει πολλή ζέστη:

• when it is very hot on the bus

But logically it also helps set the scene for the whole event, including where she sweats.

So you can think of it as mainly describing the location of the hot condition, while also contributing to the overall setting of the sentence.

Because the present tense in Greek, just like in English, is often used for habitual actions or general truths.

So:

• Η φίλη μου ιδρώνει εύκολα... does not necessarily mean she is sweating right now.
• It means this is something that generally happens.

That is why the sentence sounds like a description of her tendency:

• My friend sweats easily when it’s very hot on the bus.