היא מעצבת אגרטל עם דופן גבוהה.

היא means she.

Hebrew verbs in the present tense often already show gender and number, so מעצבת by itself can already suggest she designs / she is designing. Still, Hebrew often includes the subject pronoun for clarity or emphasis.

So:

• היא מעצבת = she is designing / she designs
• מעצבת alone can also mean is designing if the subject is understood from context

מעצבת is the feminine singular present-tense form of the verb לעצב, meaning to design or to shape.

A useful comparison:

• מעצב = masculine singular present
• מעצבת = feminine singular present
• מעצבים = masculine plural / mixed plural present
• מעצבות = feminine plural present

Because the subject is היא (she), the verb appears in the feminine singular form: מעצבת.

It can mean either one.

Hebrew present tense often covers both:

• she designs
• she is designing

The exact meaning depends on context. Unlike English, Hebrew usually does not need a separate form like is designing.

So היא מעצבת אגרטל... could mean:

• She designs a vase
• She is designing a vase

Hebrew has no separate word for a or an.

So:

• אגרטל can mean a vase or just vase, depending on context
• האגרטל means the vase

That is why אגרטל by itself is enough for a vase here.

אגרטל means vase.

It is generally treated as a masculine noun. That matters if you add adjectives directly to it.

For example:

• אגרטל גבוה = a tall vase
• האגרטל גבוה = the vase is tall

In your sentence, though, גבוהה does not describe אגרטל. It describes דופן, which is feminine.

עם means with.

So עם דופן גבוהה literally means with a high wall/side.

The word דופן often means:

• side
• wall
• sidewall

In the context of a vase or container, it usually refers to the side wall of the object.

So the phrase describes the vase as having a high side / high wall.

Because גבוהה agrees with דופן, not with אגרטל.

In Hebrew, adjectives must agree in gender and number with the noun they describe.

Here:

• דופן is feminine singular
• so the adjective must also be feminine singular: גבוהה

Compare:

• דופן גבוהה = a high side/wall (feminine)
• קיר גבוה = a high wall (masculine)

So even though אגרטל is masculine, the adjective is matching דופן.

In normal modern Hebrew usage, דופן is generally treated as feminine, which is why you see דופן גבוהה.

That is the form a learner should use.

Because את is used before a definite direct object, usually one with the.

Here the object is אגרטל = a vase, not the vase, so there is no את.

Compare:

• היא מעצבת אגרטל = She is designing a vase
• היא מעצבת את האגרטל = She is designing the vase

So the absence of את tells you the object is indefinite.

Yes. This is a very normal word order:

• היא = subject
• מעצבת = verb
• אגרטל = object
• עם דופן גבוהה = phrase describing the object

So the structure is basically:

She designs/designing a vase with a high wall.

Hebrew often uses this same order in simple present-tense sentences.

A common pronunciation would be:

hi me-a-TZE-vet a-gar-TAL im DO-fen gvo-HA

Approximate breakdown:

• היא = hi
• מעצבת = me-a-TZE-vet
• אגרטל = a-gar-TAL
• עם = im
• דופן = DO-fen
• גבוהה = gvo-HA

The main stress usually falls near the end of מעצבת, אגרטל, and גבוהה.

Yes, depending on context.

A very literal translation is something like:

• She is designing a vase with a high side wall

But in more natural English, you might say:

• She is designing a vase with high sides
• She is designing a vase with a tall wall
• She is designing a vase with a high rim/side

The exact English wording depends on what kind of vase is meant and how technical the context is. The Hebrew phrase itself is natural.