List of Spanish irregular participles

In the Spanish language there are some verbs with irregular past participles. There are also verbs with both regular and irregular participles, in which the irregular form is most used as an adjective, while the regular form tends to appear after haber to form compound perfect tenses.

Agreement
When a participle is used as adjective, it must agree in gender and number with the noun modified:

Verbs with irregular participles
1The roots -scribir, -facer, and -solver appear only in prefixed forms, e.g. inscribir, satisfacer, absolver (although a verb solver was attested). The adjective suelto means 'loose, free'. 2The variant -scripto is used in Argentina, Paraguay, and Uruguay.

Verbs derived from the stems in the table above have participles similar to those of their "parent" verbs — e.g. devolver → devuelto, componer → compuesto. Note, however, that this pattern is not followed by corromper, whose participle is regular (corrompido), nor by bendecir and maldecir (bendecido and maldecido; the forms bendito and maldito are nowadays only used as adjectives or nouns, maldicho persists in Judeo-Spanish).

Verbs with regular and irregular participles
A number of former irregular participles, such as confuso ('confused', from confundir), poseso ('possessed', from poseer), and suspenso ('suspended, hung', from suspender), are nowadays used solely as adjectives, not as participles, and are therefore no longer considered as such.