blasonar

A somewhat literary verb meaning to boast or brag about something, often a title, ancestry, or achievement: blasonar de valiente. It's also, more technically, a heraldry term for describing or interpreting a coat of arms — the older sense that the 'boasting' meaning historically comes from.

• Blasonaba de conocer a todas las celebridades del pueblo. — He boasted about knowing every celebrity in town.
• No hace falta blasonar de tus logros, ya se notan. — You don't need to brag about your achievements — they're already obvious.
• El heraldista blasonó el escudo con precisión técnica. — The herald described the coat of arms with technical precision.

In its everyday 'boast' sense, blasonar is somewhat formal/literary — jactarse or presumir (de algo) are the words most native speakers would actually reach for in conversation.