यह मेरा वचन है।

• यह = this
• मेरा = my
• वचन = word / promise / vow
• है = is

So the structure is literally This my promise is, which in natural English becomes This is my promise or This is my word.

Hindi often uses a different basic order from English. In this sentence:

• English: This is my promise
• Hindi: This my promise is

The verb है usually comes at or near the end in simple Hindi sentences. That is very normal. So even though the order feels reversed to an English speaker, it is standard Hindi structure.

Because Hindi usually places the main verb after the rest of the sentence. In equational sentences like X is Y, the is word often comes last:

• यह घर है। = This is a house.
• वह मेरा दोस्त है। = That is my friend.
• यह मेरा वचन है। = This is my promise.

So है is not being emphasized here; it is simply in its normal Hindi position.

मेरा agrees with the gender and number of the noun it describes, which here is वचन.

• वचन is a masculine singular noun.
• So the correct possessive form is मेरा.

Compare:

• मेरा वचन = my promise (masculine singular)
• मेरी किताब = my book (feminine singular)
• मेरे दोस्त = my friends or my male friend in some contexts

So मेरा is used because वचन is masculine singular.

वचन can mean word, promise, or vow, depending on context. It is a somewhat elevated or formal word.

In many everyday situations, learners may hear:

• वादा = promise

But वचन often sounds more serious, literary, traditional, or solemn. It can suggest:

• a promise given seriously
• a pledge
• a vow
• one’s word of honor

So यह मेरा वचन है। can feel stronger or more dignified than simply saying यह मेरा वादा है।

Learners often see it written as yah or yeh in Roman letters, but in actual speech it is usually closer to yeh.

So:

• यह is commonly pronounced roughly like yeh
• वह is commonly pronounced roughly like voh

But spelling in Devanagari stays यह and वह.

It can mean several things depending on context.

यह can mean:

• this
• he
• she
• it

Hindi does not have separate everyday words exactly matching English this and he/she/it in all cases. Instead, words like यह and वह often serve both demonstrative and pronoun functions.

In यह मेरा वचन है।, the most natural meaning is This is my promise.

In modern spoken Hindi, many speakers use ये where very formal written Hindi might use singular यह. So in conversation, ये मेरा वचन है may be heard.

However:

• Standard written form: यह मेरा वचन है।
• Very common spoken variant: ये मेरा वचन है।

For learning and writing carefully, यह मेरा वचन है। is the safest form.

In the present tense, Hindi often uses है, हूँ, हो, or हैं in sentences like this, so है is the normal full form here.

• यह मेरा वचन है। = complete, standard sentence

In very poetic, dramatic, or informal styles, the verb may sometimes be dropped, but for normal learning purposes you should include है.

Because Hindi does not match English word-for-word. English places is between the subject and complement:

• This is my promise

Hindi usually places the copula at the end:

• यह मेरा वचन है

So nothing is missing; Hindi is just organizing the sentence differently.

It sounds correct, but somewhat formal or weighty because of वचन. It may sound:

• solemn
• literary
• dramatic
• honorable

For a more everyday This is my promise, many speakers might say:

• यह मेरा वादा है।

So वचन is natural, but it carries a stronger and more serious tone.

Yes. In grammar terminology, वचन can also mean number, as in singular and plural.

For example:

• एकवचन = singular
• बहुवचन = plural

But in यह मेरा वचन है।, it clearly means promise / word / vow, not grammatical number.

A simple learner-friendly pronunciation is:

yeh meraa vachan hai

A few notes:

• यह ≈ yeh
• मेरा ≈ may-raa
• वचन ≈ vuh-chun or wuh-chun depending on accent
• है ≈ hai (like high, but often lighter in connected speech)

So the whole sentence is roughly: yeh may-raa vuh-chun hai

Yes. वचन can be translated as word in the sense of one’s given word, not just a random spoken word.

So possible translations include:

• This is my promise
• This is my word
• This is my vow

The best choice depends on the tone of the context.

Then the possessive adjective would change to agree with that noun.

For example:

• यह मेरी किताब है। = This is my book.
• यह मेरा वचन है। = This is my promise.

Here:

• किताब is feminine, so मेरी
• वचन is masculine, so मेरा

This agreement pattern is very important in Hindi.