هذه شهادة إتمام.

هذه means this, and it is the feminine singular form of the demonstrative.

It is used here because شهادة is a feminine noun, so Arabic matches the demonstrative to the noun’s gender.

A careful MSA pronunciation is hādhihi.

Because شهادة is feminine.

A very common sign of a feminine noun in Arabic is ة at the end, called tāʾ marbūṭa. Since شهادة ends in ة, learners will usually expect it to behave as feminine.

So:

• هذا = this, for masculine singular
• هذه = this, for feminine singular

Arabic usually does not use a present-tense word for is in sentences like this.

So هذه شهادة إتمام literally looks like:

this certificate completion

but naturally means:

This is a certificate of completion.

This kind of sentence is called a nominal sentence in Arabic.

As written, it is most naturally understood as a full sentence:

This is a certificate of completion.

That is because the noun after the demonstrative is indefinite.

A useful rule of thumb:

• هذا كتابٌ = This is a book
• هذا الكتابُ = this book

So if you want this certificate of completion as a noun phrase, the noun phrase normally needs to be definite, for example:

هذه شهادةُ الإتمامِ

شهادة إتمام is an iḍāfa construction, often called the construct phrase.

This is a very common Arabic pattern meaning something like:

• X of Y
• Y-type X
• X belonging to Y

So:

• شهادة = certificate
• إتمام = completion

Together:

شهادة إتمام = certificate of completion

In an iḍāfa:

• the first noun is the main thing: شهادة
• the second noun specifies it: إتمام

Because شهادة is the first term of an iḍāfa.

In Arabic, the first noun in an iḍāfa:

• does not take ال
• does not take tanwīn

So even though the phrase is indefinite in meaning, the first noun still loses tanwīn because of the iḍāfa structure.

If fully vowelled, it would be:

شهادةُ إتمامٍ

not شهادةٌ إتمامٍ

إتمام means completion or finishing.

It is a verbal noun (also called a maṣdar) from the verb أتمّ, which means to complete or to finish fully.

So شهادة إتمام is literally something like:

certificate of completing or certificate of completion

Because the whole phrase is indefinite here:

شهادة إتمام = a certificate of completion

If you add ال to the second noun in an iḍāfa, the whole phrase becomes definite:

• شهادةُ إتمامٍ = a certificate of completion
• شهادةُ الإتمامِ = the certificate of completion

This is an important feature of iḍāfa: the definiteness of the whole phrase is determined by the second noun.

With full case endings, it would be:

هٰذِهِ شَهادَةُ إِتمامٍ

Here is why:

• هذه: demonstrative
• شهادةُ: predicate of the sentence, so it is nominative
• إتمامٍ: second term of iḍāfa, so it is genitive

In normal unvowelled writing, those endings are usually not shown.

A careful MSA pronunciation would be:

hādhihi shahādatu itmāmin

In pause, many speakers reduce or stop on the final endings, so you may hear something closer to:

hādhihi shahādat itmām

In ordinary reading, learners should know both facts:

• the full grammatical pronunciation exists
• the pause form is very common in actual speech and recitation

No. شهادة has a wider range of meanings depending on context.

It can mean:

• testimony
• witnessing
• certificate
• degree / qualification in some contexts

Here, because it is followed by إتمام, the meaning is clearly certificate:

شهادة إتمام = certificate of completion

So this is a good example of how Arabic words often have a core meaning, and context tells you which English translation fits best.