दरवाज़ा कसकर बंद कीजिए।

Because Hindi commonly says बंद करना for to close / to shut.

• बंद = closed / shut
• करना = to do

So बंद कीजिए is the polite imperative of बंद करना, meaning please close it or please shut it.

In this sentence, the full idea is please shut the door tightly.

कसकर means tightly, firmly, or securely.

It comes from the verb कसना, which means to tighten. The -कर form often turns a verb into something adverb-like, so कसकर means in a tight/firm way.

So:

• दरवाज़ा बंद कीजिए = Close the door
• दरवाज़ा कसकर बंद कीजिए = Close the door tightly / Shut the door firmly

Because दरवाज़ा is a direct object here, and Hindi often leaves ordinary inanimate direct objects unmarked.

So दरवाज़ा बंद कीजिए is completely normal.

You can sometimes use को with direct objects in Hindi, but it is much more common with:

• animate objects
• highly specific objects
• certain stylistic or emphatic situations

For a simple sentence like this, दरवाज़ा without को is the standard choice.

Yes. कीजिए is a polite/respectful imperative, usually used with an understood आप.

So the sentence is addressing someone respectfully:

• बंद कर = very informal / blunt
• बंद करो = informal or familiar
• बंद कीजिए = polite / respectful

The full sentence could be understood as:

आप दरवाज़ा कसकर बंद कीजिए।

But Hindi usually drops the pronoun when it is obvious.

Because बंद carries the main lexical meaning, while कीजिए provides the verb form.

This is very common in Hindi. Many actions are expressed as:

noun/adjective-like word + करना

Examples:

• शुरू करना = to start
• साफ़ करना = to clean
• बंद करना = to close / to shut

So in दरवाज़ा कसकर बंद कीजिए, the word बंद tells you what action is being done, and कीजिए makes it into a polite command.

Yes, you may hear बंद करिए as well.

However, बंद कीजिए is a very common and standard polite form with करना. In everyday speech, both can occur, but कीजिए often sounds a bit more standard or careful.

So:

• दरवाज़ा बंद कीजिए = very natural
• दरवाज़ा बंद करिए = also possible

The order is:

दरवाज़ा + कसकर + बंद कीजिए

That is roughly:

door + tightly + close

Hindi usually puts the main verb toward the end, and objects normally come before the verb. Adverbs like कसकर often appear before the verbal expression they modify.

So this word order is very natural in Hindi.

Yes.

• दरवाज़ा बंद कीजिए। = Close the door.
• दरवाज़ा कसकर बंद कीजिए। = Close the door tightly / firmly.

Adding कसकर makes the instruction stronger and more specific. It suggests:

• shut it properly
• make sure it is firmly closed
• do not leave it loose or partly open

In many cases, verb stem + कर creates a form that links actions or describes the manner of an action.

With कसकर, it has an adverb-like meaning: tightly / firmly.

Learners often first meet -कर as meaning something like having done X, but in expressions like this it is often best understood more naturally as a manner expression.

So here, कसकर does not need to be translated word-for-word as having tightened. It simply means tightly.

The dotted letter ज़ represents a z sound.

So दरवाज़ा is pronounced roughly like darvāzaa / दरवाज़ा, not with a plain j sound.

That said, in everyday Hindi writing, many people also write दरवाजा without the dot. The meaning is the same, and many native speakers do not strongly distinguish the spelling in casual writing.

So you may see both:

• दरवाज़ा
• दरवाजा

Both mean door.

Yes, but that is normal.

Hindi often leaves out the subject in commands because it is already understood from the verb form.

Here, कीजिए shows that the command is polite, so the understood subject is आप.

So the sentence is effectively:

(आप) दरवाज़ा कसकर बंद कीजिए।

English also does something similar:

• Close the door. You do not say You close the door unless you want extra emphasis.