How to Say "to concoct" in Spanish
The most common Spanish word for “to concoct” is “inventar” — use 'inventar' when 'to concoct' specifically means to make up a lie, an excuse, or a fictional story, often implying dishonesty or fabrication..
inventar
/een-ben-TAR//imbenˈtaɾ/

Examples
El niño inventó una historia fantástica sobre por qué no hizo la tarea.
The child concocted a fantastic story about why he didn't do his homework.
No me mientas, dejá de inventar excusas.
Don't lie to me, stop making up excuses.
Ella inventó una historia fantástica para su sobrino.
She made up a fantastic story for her nephew.
cocinar
/koh-see-nar//ko.siˈnaɾ/

Examples
Tuvieron que cocinar una excusa creíble para el jefe.
They had to concoct a believable excuse for the boss.
El director cocinó los números para que parecieran mejores.
The director cooked the books (falsified the numbers) so they would look better.
Están cocinando un plan para fusionar las dos empresas.
They are arranging a plan to merge the two companies.
Figurative Use
When used in this sense, 'cocinar' implies detailed, often secretive, preparation, much like 'cooking up' a scheme in English.
Inventar vs. Cocinar for Excuses
Related Translations
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