e>ie stem change present tense

acertar

to guess, get right

cerrar

to close, shut

pensar (en)

to think (about)

encender

to light, kindle

temblar

to shake, tremble

fregar

to wash/scrub (dishes)

entender

to understand

querer

to want

defender

to defend

perder

to lose

negar

to deny

tropezar (con)

to bump/stumble (into)

mentir

to lie (tell)

confesar

to confess

comenzar

to start, begin, commence

consentir

to consent

preferir

to prefer

hervir

to boil

cerrar

to close

referir

to refer

to convertir

to convert

sentir

to feel, regret

advertir

to advise (warn)

sugerir

to suggest

empezar

to start, begin