*irresistible* irresistible
*irrevocable* irrevocable
*irritar* irritate
*isla* f. island
*jabón* m. soap
*jabonadura* f. washing; pl. soap suds
*jabonar* wash with soap
*jalapa* f. jalap (plant, native of Jalapa, Mexico, whose root has strong purgative properties)
*jamás* never
*jaula* f. cage