खिड़की बंद है।

A natural pronunciation is roughly:

khi-rkee band hai

A slightly more careful breakdown:

• खि = khi (an aspirated kh, not just plain k)
• ड़ = a flapped r/d sound
• की = kee
• बंद = band
• है = usually pronounced something like hai

So the full sentence sounds close to:

khirkee band hai

Word by word:

• खिड़की = window
• बंद = closed / shut
• है = is

So the structure is literally:

window closed is

which in natural English becomes The window is closed.

Hindi often puts descriptions before है.

So instead of:

• English: The window is closed
• Hindi: Window closed is

This is very normal in Hindi. The basic pattern here is:

noun + adjective/state + है

So:

• दरवाज़ा खुला है = The door is open
• कमरा साफ़ है = The room is clean

In this sentence, बंद is best understood as describing a state: closed / shut.

So खिड़की बंद है means The window is in a closed state.

It is not the same as saying someone closes the window. For that, Hindi would use a different verbal construction, such as:

• वह खिड़की बंद करता है = He closes the window
• उसने खिड़की बंद की = He/She closed the window

So here, बंद functions like a predicate adjective or state word.

है is the present-tense form of to be for he/she/it/this/that and singular nouns.

In this sentence it means is:

• खिड़की बंद है = The window is closed

Without है, the sentence may sound incomplete in standard Hindi unless used in a special conversational style.

Because खिड़की is singular.

• खिड़की बंद है = The window is closed
• खिड़कियाँ बंद हैं = The windows are closed

So:

• है = is for singular
• हैं = are for plural / respectful forms

Good question. Many Hindi adjectives change form depending on gender and number, but बंद is an indeclinable adjective in this use, so it does not change.

That means it stays बंद with masculine, feminine, singular, and plural nouns:

• दरवाज़ा बंद है = The door is closed
• खिड़की बंद है = The window is closed
• दरवाज़े बंद हैं = The doors are closed
• खिड़कियाँ बंद हैं = The windows are closed

By contrast, some adjectives do change, for example:

• दरवाज़ा खुला है = The door is open
• खिड़की खुली है = The window is open

Here खुला / खुली changes, but बंद does not.

Hindi usually does not use articles like a, an, and the the way English does.

So खिड़की can mean:

• a window
• the window

The exact meaning depends on context.

In a simple sentence like खिड़की बंद है, English usually translates it as The window is closed, but Hindi does not need a separate word for the.

Yes, depending on context, खिड़की बंद है could be understood as A window is closed or The window is closed.

However, in normal isolated translation practice, learners usually render it as The window is closed because it sounds most natural in English.

Hindi often leaves definiteness unstated unless context makes it important.

That symbol is called the danda: ।

It is traditional punctuation in Devanagari and works like a full stop / period.

So:

• खिड़की बंद है।

means the same kind of sentence ending as:

• The window is closed.

In modern informal writing, especially online, some people may also use a regular period, but । is standard in Hindi writing.

Yes. You may see both:

• बंद
• बन्द

Both represent the same word, closed/shut.

In modern standard Hindi, बंद is very common and widely preferred in everyday writing. So for learners, खिड़की बंद है is an excellent form to remember.

Add नहीं before है:

• खिड़की बंद नहीं है। = The window is not closed.

If you want to say The window is open, you would normally say:

• खिड़की खुली है।

A simple yes/no question is:

• क्या खिड़की बंद है? = Is the window closed?

Here क्या at the beginning helps mark the sentence as a question.

In speech, intonation also helps. Without changing much else, Hindi can often form questions very simply.