convencido
/kohm-behn-SEE-doh/
convinced

When you are convencido (convinced), you feel certain about your decision.
convencido(Adjective)
convinced
?sure about something
,certain
?having no doubt
sure
?informal synonym
📝 In Action
Ella está convencida de que ganaremos el partido.
A2She is convinced that we will win the game.
Los científicos están convencidos de la importancia de este descubrimiento.
B1The scientists are certain of the importance of this discovery.
¿Estás convencido de tu decisión?
A2Are you sure about your decision?
💡 Grammar Points
Agreement is Key
As an adjective, 'convencido' must change its ending to match the person or thing it describes: 'convencido' (masculine singular), 'convencida' (feminine singular), 'convencidos' (masculine plural), 'convencidas' (feminine plural).
Using 'de'
You almost always follow 'convencido' with the word 'de' (of/about) before stating what you are convinced about: 'Estoy convencido de que...' (I am convinced that...).
❌ Common Pitfalls
Forgetting Gender
Mistake: "La jefa está convencido."
Correction: La jefa está convencida. (The boss is feminine, so the adjective must end in -a.)
⭐ Usage Tips
Expressing Certainty
'Estoy convencido' is a strong way to express certainty, stronger than just 'estoy seguro' (I am sure).

As a past participle, convencido is used to form perfect tenses, meaning the action of convincing is completed.
convencido(Past Participle)
convinced
?used after 'haber' to form perfect tenses
persuaded
?in the verbal sense
📝 In Action
Hemos convencido a la audiencia con nuestros datos.
B1We have convinced the audience with our data.
No me habías convencido la última vez.
B2You hadn't convinced me last time.
💡 Grammar Points
Forming Compound Tenses
When 'convencido' is used as a Past Participle, it always pairs with a form of the helper verb 'haber' (to have) to describe actions completed in the past. In this use, the ending -o never changes.
❌ Common Pitfalls
Mixing Verbal and Adjectival Use
Mistake: "Hemos convencida a la gente. (Incorrect agreement with 'haber'.)"
Correction: Hemos convencido a la gente. (When used with 'haber', the participle always stays 'convencido', regardless of who or what was convinced.)
⭐ Usage Tips
The Root Verb
This form comes from the verb 'convencer' (to convince). Understanding the root verb helps you know when to use this form versus the adjectival form.
✏️ Quick Practice
💡 Quick Quiz: convencido
Question 1 of 2
Which sentence correctly uses 'convencido' as an adjective?
📚 More Resources
Frequently Asked Questions
What is the difference between 'convencido' and 'convincente'?
'Convencido' describes the *state* of being sure (I am convinced). 'Convincente' describes something that *causes* certainty (The argument was convincing).
Does 'convencido' ever change its ending when used with 'haber'?
No. When used with the helper verb 'haber' to form compound tenses (like 'he convencido'), the past participle always stays in the masculine singular form: 'convencido.' It only changes the ending (-a, -os, -as) when it acts as a standalone adjective.