verbos radicales (e-->i, i-->í, u-->ú, y)

despedir

to fire, to let go

despedirse

to say goodbye

gemir

to groan, to moan

impedir

to stop, to intrude

medir

to measure

pedir

to ask for, to request

reír

to laugh

reñir

to scold

repetir

to repeat

seguir

to follow, to keep on

servir

to serve

sonreír(se)

to smile

vestir(se)

to dress

confiar

to confide, to rely on

enviar

to send

espiar

to spy

fiarse

to trust

variar

to vary

actuar

to act

graduarse

to graduate

continuar

to continue

atribuir

to attribute

concluir

to conclude

contribuir

to contribute

destruir

to destroy

distribuir

to distribute

huir

to flee, to run away

incluir

to include

influir

to influence

sustituar

to substitute