Η γιαγιά μου βάζει σταφίδες στο γλυκό της.

In Greek, you normally use the definite article with a noun even when it has a possessive pronoun.

So Greek says:

η γιαγιά μου = my grandmother

Literally, that looks like the grandmother my, but that is the normal Greek pattern. Leaving out η here would usually sound wrong.

Greek possessive words like μου (my), σου (your), της (her) are often placed after the noun.

So:

η γιαγιά μου = my grandmother
το σπίτι μου = my house

This is one of the biggest differences from English word order. In everyday Greek, this post-noun position is extremely common.

βάζει is the 3rd person singular present tense of βάζω.

That means it matches η γιαγιά μου = my grandmother / she.

So:

• βάζω = I put
• βάζεις = you put
• βάζει = he/she/it puts

In this sentence, βάζει can mean either:

• puts / adds in a general or habitual sense
• is putting depending on context

Very often, a sentence like this is understood as a habit: My grandmother puts raisins in her dessert.

Because the sentence is talking about raisins, not a raisin.

Greek often uses the plural here just like English does:

σταφίδες = raisins

It is also the direct object of βάζει, so it is in the accusative plural. For many feminine nouns like this one, the nominative plural and accusative plural look the same, so σταφίδες can serve as both.

στο is a contraction of:

σε + το = στο

Here, σε is a very common preposition that can mean in, into, to, at, or on, depending on context.

So:

στο γλυκό = in the dessert / into the dessert

Greek makes this contraction all the time:

• σε + τη(ν) → στη(ν)
• σε + το → στο
• σε + τον → στον

Because γλυκό is a neuter singular noun here.

The article has to match the noun’s gender and number:

• το γλυκό = the dessert / the sweet
• στο γλυκό = in/into the dessert

If the noun were feminine or masculine, the form would change:

• στη σαλάτα = in the salad
• στον καφέ = in the coffee / to the coffee

So στο is used because γλυκό is neuter singular.

Yes. γλυκό can be:

• an adjective meaning sweet
• a noun meaning sweet / dessert

In this sentence, it is a noun:

το γλυκό = the dessert / the sweet dish

This is very common in Greek. So even if you first learned γλυκός / γλυκιά / γλυκό as the adjective sweet, here it is being used as a standalone noun.

Just like μου means my, της can mean her when it comes after a noun.

So:

το γλυκό της = her dessert

Literally, it is the same structure as earlier:

• η γιαγιά μου = my grandmother
• το γλυκό της = her dessert

Here της refers back to η γιαγιά μου, so the meaning is her dessert, meaning the grandmother’s dessert.

No, Greek word order is more flexible than English word order.

This sentence uses a very neutral, natural order:

Η γιαγιά μου βάζει σταφίδες στο γλυκό της.

That is basically:

subject + verb + object + prepositional phrase

But Greek can move parts around for emphasis. For example, if you wanted to emphasize σταφίδες, you might place it differently. Even so, the version you were given is the most straightforward one for a learner.

Greek does not always separate those meanings the way English does.

The preposition σε often covers several English ideas, including:

• in
• into
• to
• at
• on

The exact meaning usually comes from the verb and the situation.

With βάζω (put), the idea is naturally something like put into. So στο γλυκό της can be understood as into her dessert, even though English may also simply say in her dessert.