मैं ज़रूर आऊँगी।

Because the speaker is female.

In Hindi, future-tense verb forms often show the speaker’s gender:

• मैं आऊँगा = I will come (said by a male)
• मैं आऊँगी = I will come (said by a female)

So in मैं ज़रूर आऊँगी, the ending -गी tells you the speaker is feminine.

A male speaker would say:

मैं ज़रूर आऊँगा।

The only change is:

• आऊँगी → आऊँगा

Everything else stays the same.

ज़रूर means definitely, certainly, or for sure.

So it adds a sense of strong assurance:

• मैं आऊँगी = I will come
• मैं ज़रूर आऊँगी = I will definitely come

It is a very common word in everyday Hindi.

In this sentence, ज़रूर comes before the verb:

• मैं ज़रूर आऊँगी।

That is the most natural placement.

You may also hear slight variations in speech depending on emphasis, but for a learner, the safest pattern is:

subject + ज़रूर + verb

So:

• मैं ज़रूर जाऊँगा
• वह ज़रूर आएगी
• हम ज़रूर करेंगे

The basic verb is आना, which means to come.

In this sentence, आना changes into the future form आऊँगी.

So roughly:

• आना = to come
• आऊँगी = will come (female speaker, I form)

This is not just the plain dictionary form; it is a conjugated future-tense form.

It is the first-person singular future feminine form of आना.

A useful learner shortcut is:

• मैं आऊँगा = I will come (male)
• मैं आऊँगी = I will come (female)

You do not need to memorize a complicated rule at first; just learn this as the future form used with मैं.

If you compare it with other verbs:

• करना → मैं करूँगा / करूँगी
• जाना → मैं जाऊँगा / जाऊँगी
• आना → मैं आऊँगा / आऊँगी

So आना follows a pattern similar to जाना.

The mark ँ shows nasalization.

In आऊँगी, the ऊँ part is pronounced with a nasal sound, something like:

• aa-oon-gee
  or more precisely
• aaũ-gī

You do not pronounce a full separate n sound like in English no. Instead, the vowel is nasalized.

This nasalization is very common in Hindi verb forms such as:

• करूँगा
• जाऊँगी
• लूँगा

A simple learner-friendly pronunciation is:

za-roor

More carefully:

• ज़ = like z
• रूर = roor with a long oo sound

So: za-ROOR

The second syllable is usually stressed more strongly in natural speech.

That dot is called a nukta.

It changes the sound of the letter:

• ज is usually closer to j as in jam
• ज़ is closer to z as in zoo

So:

• जरूर may be written informally sometimes, but
• ज़रूर shows the pronunciation more accurately

In modern Hindi writing, people are not always perfectly consistent with nuktas, but learners should recognize that ज़ is intended to sound like z.

Yes, मैं can sometimes be omitted if the context is already clear.

For example, in conversation, someone might simply say:

ज़रूर आऊँगी।

That still means I will definitely come, and the verb form already suggests first person feminine.

However, including मैं is completely natural and often clearer, especially for learners.

It is neutral and natural. It works in many situations.

मैं ज़रूर आऊँगी। can be used:

• with friends
• in normal conversation
• in polite everyday speech

It is not slang, and it is not overly formal.

If you wanted to sound extra formal in a written or respectful context, the sentence would usually still be fine as it is.

Usually it expresses strong intention or assurance, but the exact force depends on context and tone.

It can mean things like:

• I’ll definitely come
• I’m sure I’ll come
• I’ll certainly be there

Sometimes it sounds like a promise; sometimes it just sounds confident.

So ज़रूर is strong, but not necessarily dramatic.

Roughly, yes:

• मैं = I
• ज़रूर = definitely / certainly
• आऊँगी = will come (female speaker)

So the sentence is literally close to:

I definitely will come.

But the most natural English translation is usually:

I will definitely come.

or

I’ll definitely come.

आऊँगी is specifically the first-person singular feminine future form, so it is used with मैं when the speaker is female.

Other subjects take different forms. For example:

• मैं आऊँगी = I will come (female)
• वह आएगी = she will come
• तुम आओगे / आओगी = you will come
• हम आएँगे / आएँगी = we will come

So you should not use आऊँगी with every subject.

They come from the same verb आना, but they are used with different subjects:

• आऊँगी = I will come (female speaker)
• आएगी = she will come

So:

• मैं ज़रूर आऊँगी। = I will definitely come.
• वह ज़रूर आएगी। = She will definitely come.

This difference is very important in Hindi verb conjugation.