Το μαντήλι μου ταιριάζει με το παλτό μου.

Because both nouns are neuter singular, and Greek normally uses the definite article with nouns much more often than English does.

• το μαντήλι = the scarf / the handkerchief
• το παλτό = the coat

In this sentence, the article is still used even though English would usually just say my scarf and my coat, without the.

So:

• το μαντήλι μου = my scarf
• το παλτό μου = my coat

Greek structure here is literally closer to the scarf my and the coat my.

In Greek, the usual possessive word for my is μου, and it normally comes after the noun:

• το μαντήλι μου = my scarf
• το παλτό μου = my coat

This is completely normal Greek word order.

English says:

• my scarf

Greek usually says:

• the scarf my

If you want extra emphasis, Greek can also use δικός μου / δική μου / δικό μου, but that is not the neutral everyday pattern here.

Because each noun needs its own possessive.

• το μαντήλι μου = my scarf
• το παλτό μου = my coat

You cannot usually use one μου and have it automatically apply to both nouns in a sentence like this. Greek normally repeats it where needed.

So the sentence clearly means:

• My scarf matches my coat

not something vague like My scarf matches the coat.

ταιριάζει is the 3rd person singular present tense of the verb ταιριάζω.

Here it agrees with the subject το μαντήλι μου, which is singular:

• το μαντήλι μου ταιριάζει = my scarf matches / suits / goes well

Some useful forms:

• ταιριάζω = I match / I suit
• ταιριάζεις = you match
• ταιριάζει = he/she/it matches
• ταιριάζουμε = we match
• ταιριάζετε = you all match
• ταιριάζουν = they match

Since μαντήλι is singular, ταιριάζει is singular too.

Because the grammatical subject is only το μαντήλι μου.

The phrase με το παλτό μου is not another subject; it is a prepositional phrase meaning with my coat.

So the structure is:

• Το μαντήλι μου = subject
• ταιριάζει = verb
• με το παλτό μου = complement with με

That is why the verb is singular.

If the subject were plural, the verb would also be plural:

• Τα μαντήλια μου ταιριάζουν με το παλτό μου.
• My scarves match my coat.

Here με means with.

After ταιριάζω, με is commonly used to show the thing that matches or goes well with something else:

• ταιριάζω με κάτι = to match/go with something

So:

• Το μαντήλι μου ταιριάζει με το παλτό μου.
• My scarf matches/goes with my coat.

This is a very common pattern in Greek.

Both nouns are in forms that look the same as the nominative/accusative singular neuter, but they have different jobs in the sentence.

• το μαντήλι μου = subject, so nominative
• με το παλτό μου = after the preposition με, so accusative

For neuter singular nouns like these, the nominative and accusative forms are often identical, so you do not see a visible change here.

Not always. μαντήλι can refer to different kinds of cloth items depending on context, such as:

• scarf
• kerchief
• headscarf
• sometimes handkerchief

In this sentence, because it is being matched with a coat, the most natural meaning is probably scarf.

So context is what tells you which English word fits best.

Yes. Greek word order is more flexible than English word order.

The neutral order here is:

• Το μαντήλι μου ταιριάζει με το παλτό μου.

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

• Με το παλτό μου ταιριάζει το μαντήλι μου.

That still means roughly the same thing, but it may sound more marked or emphatic depending on context.

For a learner, the original order is the safest and most natural one to use.

No, that would sound wrong in normal standard Greek.

Greek usually requires the article in expressions like this:

• το μαντήλι μου
• το παλτό μου

Unlike English, Greek does not normally drop the article before a possessed noun.

So you should say:

• Το μαντήλι μου ταιριάζει με το παλτό μου.

not:

• Μαντήλι μου ταιριάζει με παλτό μου

Yes, but that changes the feel.

The normal, neutral way is:

• το μαντήλι μου = my scarf

A more emphatic form is:

• το δικό μου μαντήλι = my own scarf / my scarf (as opposed to someone else’s)

So in this sentence, μου alone is the natural everyday choice. Using δικό μου would add emphasis or contrast.

You add δεν before the verb:

• Το μαντήλι μου δεν ταιριάζει με το παλτό μου.

So:

• δεν ταιριάζει = does not match / doesn’t go with

This is the normal way to negate a present-tense verb in Greek.

Yes. Depending on context, Greek speakers may also use expressions like:

• Το μαντήλι μου πάει με το παλτό μου.
• literally My scarf goes with my coat

But ταιριάζει με is a very clear and standard way to express matches / goes well with.

So the sentence you have is perfectly good, natural Greek.