असल वजह किराया है।

A word-by-word breakdown is:

• असल = real, actual
• वजह = reason, cause
• किराया = rent, fare
• है = is

So the sentence structure is literally something like:

actual reason rent is

Natural English: The real reason is the rent or The real reason is rent.

Hindi often puts the verb at the end, so है usually comes last.

English:

• The real reason is rent

Hindi:

• असल वजह किराया है।
• literally: real reason rent is

So in this sentence:

• असल वजह = the real reason
• किराया = rent
• है = is

This is completely normal Hindi word order.

Hindi usually does not have articles like a, an, and the.

So:

• वजह can mean a reason, the reason, or just reason
• किराया can mean rent, the rent, or a rent/fare, depending on context

The context tells you how definite it is. In this sentence, English naturally uses the: The real reason is the rent.

Yes. असल is describing वजह, so it works like an adjective here: real/actual reason.

A useful thing to know is that असल often stays the same form and does not change for gender or number.

So you can see:

• असल वजह = the real reason
• असल बात = the real matter / the real point
• असल समस्या = the real problem

You may also hear असली, which is another common way to say real:

• असली वजह = the real reason

Both are possible, though the tone can differ slightly by context.

Both वजह and कारण can mean reason/cause, but they are used a little differently.

• वजह is very common in everyday speech
• कारण sounds a bit more formal or bookish in many contexts

So:

• असल वजह किराया है। = natural, everyday
• असल कारण किराया है। = also correct, but somewhat more formal

A learner will hear वजह very often in conversation.

Because this is a simple X is Y sentence.

Structure:

• असल वजह = the real reason
• किराया = rent
• है = is

So the sentence means:

• The real reason is rent

You do not need का/की/के here.

Those words are used for possession or relation, such as:

• घर का किराया = the rent of the house / house rent
• इसकी वजह = the reason for this / its reason

But in असल वजह किराया है, you are just equating one thing with another: the reason = rent.

है is the singular present form of to be: is.

In this sentence:

• है = is

Hindi uses:

• है for singular
• हैं for plural or polite/formal subjects

Examples:

• वजह किराया है। = The reason is rent.
• वजहें कई हैं। = The reasons are many.

In the present tense, है itself does not change for masculine vs. feminine. So even though वजह is feminine, you still say है, not some feminine version.

Yes:

• वजह is generally feminine
• किराया is masculine

But in this sentence, that does not visibly affect the verb, because है stays the same.

Gender becomes more noticeable with adjectives or past participles in other kinds of sentences.

For example:

• अच्छी वजह = good reason
  (अच्छी agrees with feminine वजह)
• ज़्यादा किराया = more rent
  (no special visible issue here, but किराया is masculine)

Yes, absolutely.

Both of these are possible:

• असल वजह किराया है।
• असली वजह किराया है।

Both mean roughly The real reason is rent.

Very broadly:

• असल can sound slightly more like actual/real
• असली can also mean real/genuine

In many everyday contexts, both work fine.

किराया can mean both:

• rent for a house, room, property, etc.
• fare for transport

The context decides which meaning is intended.

Examples:

• घर का किराया = house rent
• बस का किराया = bus fare

In your sentence, if the context is about housing or cost of living, किराया most likely means rent.

Sometimes, yes, depending on context.

Literally, वजह means reason/cause, so reason is the most direct translation.

But in natural English, people sometimes say:

• The real issue is rent
• The real problem is the rent

Those are looser, more context-based translations. If you want the most literal meaning, stick with reason.

A simple pronunciation guide:

• असल ≈ uh-sul
• वजह ≈ vuh-jah or wuh-jah
• किराया ≈ ki-raa-yaa
• है ≈ hai (like high, but often shorter depending on speech)

A fuller flow:

• असल वजह किराया है
• uh-sul vuh-jah ki-raa-yaa hai

Depending on accent, व may sound somewhere between English v and w.

Usually, learners should keep it.

So say:

• असल वजह किराया है।

In very casual speech, poetry, headlines, or certain conversational styles, Hindi sometimes drops forms of to be, but this is not something beginners should copy too early.

Using है is the safe and correct choice here.

Yes, it is understandable and natural.

Depending on context, speakers might also say things like:

• असल वजह किराया ही है। = The real reason is rent itself / is indeed rent.
• असली वजह किराया है।
• वजह असल में किराया है। = The reason is actually the rent.

But असल वजह किराया है। is a good, correct sentence.