• Beautiful: [adjective]
- English meaning: Very attractive.
- Bangla meaning: সুন্দর, চমৎকার; মন ও ইন্দ্রিয়কে আনন্দ দেয় এমন।
- Example: She was wearing a beautiful dress.
- এর noun form হচ্ছে - Beauty.

• Beauty: [noun]
- English meaning: The quality of being pleasing and attractive, especially to look at.
- Bangla meaning:  সৌন্দর্য, শ্রী, রূপ, লাবণ্য।
- Example: The piece of music he played had a haunting beauty.

• Other forms:
• Beautify (verb)
- English meaning: to improve the appearance of someone or something:
- Bangla meaning: সুন্দর করা।
- Example: Money has been raised to beautify the area.

• Beauteous (adjective)
- English meaning: Very attractive to look at
- Bangla meaning: (কাব্য) সুন্দর; রূপবান; শোভাময়।
- Example: The day ended with a beauteous sunset.

• Beautifully (adverb)
- English meaning: in a way that is very attractive
- Bangla meaning: সুন্দরভাবে,চমৎকারভাবে।
- Example: She carried her wedding dress so beautifully. 

Source: 
1. Accessible Dictionary by Bangla Academy.
2. Oxford Learner's Dictionary.
3. Cambridge Dictionary.

He doesn’t understand why he is always late.

উল্লিখিত অংশ, "why he is always late," হলো Noun Clause।

ব্যাখ্যা: এটি understand ক্রিয়ার object হিসেবে ব্যবহার হয়েছে। যেহেতু এটি একটি transitive verb এর object, তাই এটি noun clause হয়।

Noun Clause:

Noun clause হলো এমন একটি subordinate clause, যা বাক্যে noun-এর মতো কাজ করে।

এটি সবসময় dependent clause, অর্থাৎ একা standalone বাক্য হিসেবে দাঁড়াতে পারে না।

সাধারণত Noun clause ব্যবহৃত হয়, যখন একক noun দিয়ে বোঝানো সম্ভব নয়।

বাক্যের বিভিন্ন স্থানে Noun Clause ব্যবহার করা যায়:

Subject হিসেবে:

What will he do is uncertain.

(বাংলা: সে কী করবে তা অনিশ্চিত।)

Transitive verb এর object হিসেবে:

I believe what you have said.

(বাংলা: আমি বিশ্বাস করি তুমি যা বলেছ তা।)

Linking verb এর complement হিসেবে:

The reason is why they are angry.

(বাংলা: কারণ হলো কেন তারা রেগে আছে।)

Preposition এর পরে:

Listen to what they say.

(বাংলা: তারা যা বলে তা শুনো।)

Noun Clause as Apposition

Example Sentence:

• The fact that metals expand when heated is useful in engineering.

• Here, ‘that metals expand when heated’ is a Noun Clause.

Explanation:

• Noun clauses can function as apposition to a noun or pronoun.

• Words like News, Belief, Fact, Rumour are often followed by a noun clause in apposition.

• In this case, ‘that metals expand when heated’ gives extra information about fact.

Note on Apposition:

• Apposition provides additional information about a noun/pronoun.

• It does not modify the noun like an adjective clause.

Uses of Noun Clauses:

1. As Subject of a verb.

2. As Object of a transitive verb.

3. As Complement after a linking verb.

4. As Object of a preposition.

5. As Apposition to a noun/pronoun.

More Examples:

• The fact that ice floats on water is due to its lower density. → Noun clause in apposition

• The fact that all living organisms need water to survive highlights the importance of clean water. → Noun clause in apposition

Clause vs Phrase:

• Clause: Must have a finite verb (with tense).

• Phrase: May or may not contain a verb; if it does, it does not follow tense structure.

Summary:

A Noun Clause in apposition provides additional information about a noun/pronoun without modifying it and always begins with words like that, whether, what, etc.