He still felt really tired and wanted to stay in bed. Here the underlined part is -

• He still felt really tired and wanted to stay in bed. Here the underlined part is - Adjective.

• Adjective:
- বাক্যের মধ্যে যে শব্দটি noun বা pronoun কে বিশেষায়িত করে তাকে adjective বলে।
- The parts of speech that modify a noun or a pronoun in a sentence are called adjectives.
- It is a part of speech that can be used to describe or provide more information about a noun or pronoun that acts as the subject in a sentence.

- অর্থাৎ, যে শব্দ noun/pronoun এর দোষ, গুণ, অবস্থা, সংখা, পরিমাণ ইত্যাদি প্রকাশ করে তাকে Adjective বলে।
- We can use adjectives to describe people, places and things.

• Tired:
English meaning: in need of rest or sleep.
Bnagla meaning: শ্রান্ত; ক্লান্ত; অবসন্ন।

• He still felt really tired and wanted to stay in bed.
- প্রদত্ত বাক্যে tired দ্বারা subject এর অবস্থা প্রকাশ করেছে বলে এটি adjective.