Acertar
To guess, to get right
Encender
To light, kindle
Advertir
To advise, to warn
Entender
To understand
Cerrar
To close, shut
Fregar
To scrub, wash dishes
Comenzar
To begin
Hervir
To boil
Confesar
To confess
Mentir
To lie
Consentir
To consent
Negar
To deny
Convertir
To convert
Pensar (en)
To think (about)
Defender
To defend
Perder
To lose
Empezar
To begin
Preferir
To prefer
Which verb forms?
the letter e in the stem changes to ie in all but the nosotros and vosotros forms.