[noun], [adjective] [not gradable] - (a word) describing a situation in which the person who does the action also feels its effectIn the sentence, 'He prides himself on doing a good job', 'prides' is a reflexive verb and 'himself' is a reflexive pronoun.See study section: Reflexive verbs and pronouns
REFLEXIVE
Meaning of REFLEXIVE in English
Cambridge English vocab. Кембриджский английский словарь. 2012