egotist
definition
a person who is excessively self-centered or self-absorbed
example
His constant bragging about his accomplishments revealed him to be a classic egotist who cared little for others' opinions.
synonyms
narcissistegocentricself-absorbed
word origin — The word 'egotist' comes from the Latin 'ego', meaning 'I', combined with the suffix '-ist', indicating a person characterized by a certain tendency or behavior.