He loves himself, The underlined word is:

• The required answer is - Reflexive pronoun.

• বাক্যের subject এবং object দুটোই একই ব্যক্তি বুঝালে object এ Reflexive Pronoun হবে।
- তাই, এখানে object হিসেবে himself হলো Reflexive Pronoun.

• Reflexive Pronoun:
- যে সকল pronoun, personal pronoun এর সাথে self/ selves যোগে গঠিত হয় সেগুলোকে Reflexive pronoun বলে।
- একই ব্যক্তি Subject ও Object হয় এবং Object হিসেবে Reflexive Pronoun (যেমন: himself, myself, themselves etc.) বসে।
- কতিপয় reflexive pronoun হচ্ছে - myself, ourselves, yourself, yourselves, himself, itself etc.

• Pronoun:
- Pronoun হলো noun এর পরিবর্তে ব্যবহৃত word. এ কারণে Pronoun কে Substituting word বলে।
- Example: He, She, We, They, I, etc.

• Pronoun ৮ প্রকার। যথা:
- Personal Pronoun: I, me, my, mine, we, us, our, ours, you, thee, your, yours, he, him, his, she, her, hers. it, its, they, them, etc.
- Reflexive Pronoun: myself, ourselves, yourself, yourselves, himself, herself, themselves, etc.
- Demonstrative Pronoun: this, these, that, those, so, such, the same, etc.
- Indefinite Pronoun: one, any, some, many, few, several, no one, everyone, none, someone, nobody, anybody, some, etc.
- Interrogative Pronoun: what, which, who, whom, whose, etc.
- Relative Pronoun: what, which, who, whom, whose, that, as, but, whoever, whomever, whatever, etc.
- Distributive Pronoun: each, either, neither, etc.
- Reciprocal Pronoun: Each other, One another.

Source: A Passage To The English Language, S. M. Zakir Hussain.