La jarra tiene un asa.

Because jarra is a feminine noun in Spanish, so it takes the feminine definite article la.

• la jarra = the jug / the pitcher
• una jarra = a jug / a pitcher

There is no simple rule that all nouns ending in -a are feminine, but many of them are, and jarra is one of them.

In Spain, jarra usually means a jug, pitcher, or sometimes a large mug, depending on context.

In La jarra tiene un asa, the most natural idea is:

• a jug
• a pitcher
• a container with a handle

So jarra here is not just any container; it is one that typically can have an asa.

Tiene is the third-person singular form of the verb tener (to have).

Conjugation of tener in the present:

• yo tengo = I have
• tú tienes = you have
• él / ella / usted tiene = he / she / you have

Since la jarra is a singular subject (the jug), Spanish uses tiene:

• La jarra tiene un asa. = The jug has a handle.

Because Spanish usually does not need subject pronouns when the subject is already clear.

Here, the subject is explicitly stated:

• La jarra = the jug

So saying Ella tiene un asa would sound odd unless you were contrasting it with something else. Spanish normally prefers:

• La jarra tiene un asa.

instead of:

• La jarra ella tiene un asa. ❌

This is one of the most important points in the sentence.

Asa is a feminine noun:

• el asa is wrong in the normal sense
• the noun is still feminine

But in the singular, feminine nouns beginning with a stressed a- sound often use el or un instead of la or una to make pronunciation easier.

So:

• el asa
• un asa

But the noun is still feminine.

You can see that from adjectives:

• el asa rota = the broken handle
  not el asa roto

And in the plural, it goes back to normal feminine articles:

• las asas
• unas asas

It is feminine.

The masculine-looking article in the singular does not make the noun masculine. It is just a sound rule used with some feminine nouns that start with a stressed a sound.

Examples of the same pattern:

• el agua fría = the cold water
• el águila blanca = the white eagle
• un aula pequeña = a small classroom
• un asa rota = a broken handle

Notice that the adjectives stay feminine:

• fría
• blanca
• pequeña
• rota

In this context, asa means handle, especially the loop-like handle on things such as:

• a jug
• a cup
• a bag
• a pot

For many objects in Spanish, asa refers to the kind of handle you hold with your hand through or around.

A useful comparison:

• asa = handle of a cup, jug, bag, pot
• mango = handle of a tool or utensil, like a knife, hammer, frying pan, or umbrella

So with jarra, asa is the natural word.

Normally, La jarra tiene un asa is the standard and most natural version.

Using un makes sense because you are saying the jug has a handle.

Without the article:

• La jarra tiene asa

this can sound less natural on its own, or more like a label/description in certain contexts. For a normal full sentence, learners should use:

• La jarra tiene un asa.

Spanish usually expresses possession with tener (to have), just like English.

So:

• La jarra tiene un asa. = The jug has a handle.

Spanish does not normally say something equivalent to is with a handle here.

In Spain, jarra is pronounced approximately like:

• HA-rra

A few points:

• The j is a strong throaty sound, not like the English j in jam
• The rr is a rolled or trilled r
• The stress is on the first syllable: JA-rra

So the word is not pronounced like English jar.

Asa is pronounced approximately:

• A-sa

The stress is on the first syllable:

• A-sa

The s in Spain is a normal s sound here.

This is the normal Spanish word order:

• subject + verb + object

So:

• La jarra = subject
• tiene = verb
• un asa = object

That makes it a very straightforward sentence.

Other word orders are possible in Spanish in special contexts, but for a basic statement, this is the standard pattern.

The plural would be:

• Las jarras tienen asas. = The jugs have handles.

Notice the changes:

• la jarra → las jarras
• tiene → tienen
• un asa → asas

You could also say:

• Las jarras tienen unas asas.

but very often Spanish simply says asas in the plural when speaking generally.

Yes. The same rule applies with the definite article.

Singular:

• el asa
• un asa

Plural:

• las asas
• unas asas

Again, the noun is still feminine, even when it takes el or un in the singular.

It would be feminine, because asa is feminine.

Examples:

• un asa pequeña = a small handle
• el asa rota = the broken handle
• un asa blanca = a white handle

Not:

• un asa pequeño ❌
• el asa roto ❌

This is a very common thing learners need to notice.

Yes, it is grammatically natural and completely understandable.

It sounds like:

• a simple description of an object
• something from a language lesson
• a statement about what a jug is like

In everyday speech, a native speaker might also say more specific things depending on context, but La jarra tiene un asa is perfectly normal Spanish.