endurecer Present Conjugation
endurecer — to harden
The present tense of endurecer is irregular in the 'yo' form: endurezco.
endurecer Present Forms
When to Use the Present
Use this tense to describe physical processes (like cement drying) or metaphorical changes (like someone becoming stricter) that are happening now or habitually.
Notes on endurecer in the Present
This verb follows the -ecer pattern, meaning it adds a 'z' before the 'c' in the first-person singular (yo endurezco) to maintain the soft 'th' or 's' sound.
Example Sentences
Yo siempre endurezco mi postura cuando hay injusticias.
I always harden my stance when there are injustices.
yo
El frío endurece la mantequilla rápidamente.
The cold hardens the butter quickly.
él/ella/usted
Las leyes se endurecen cada año.
The laws get tougher (harden) every year.
ellos/ellas/ustedes
Common Mistakes
Mistake: Yo endureco.
Correct: Yo endurezco.
Why: Verbs ending in -ecer require a 'zc' in the 'yo' form to preserve the phonetic sound of the verb.
Master Spanish verbs in context
Memorizing tables only gets you so far. Read 200+ illustrated and narrated Spanish stories to see verbs like 'endurecer' used naturally — in the tenses you're learning.
Related Tenses
Preterite
yo: endurecí
The preterite of endurecer is regular: endurecí, endureciste, endureció, endurecimos, endurecisteis, endurecieron.
Imperfect
yo: endurecía
The imperfect of endurecer is regular: endurecía, endurecías, endurecía, endurecíamos, endurecíais, endurecían.
Future
yo: endureceré
The future of endurecer is regular: endureceré, endurecerás, endurecerá, endureceremos, endureceréis, endurecerán.
Conditional
yo: endurecería
The conditional of endurecer is regular: endurecería, endurecerías, endurecería, endureceríamos, endureceríais, endurecerían.
Present Subjunctive
yo: endurezca
The present subjunctive of endurecer uses the 'zc' stem: endurezca, endurezcas, endurezca, etc.
Imperfect Subjunctive
yo: endureciera
The imperfect subjunctive of endurecer is formed from the third-person plural preterite: endureciera.
Affirmative Imperative
yo: endurece
The imperative of endurecer uses 'endurece' (tú) and 'endurezca' (usted).
Negative Imperative
yo: no endurezcas
The negative imperative always uses the present subjunctive forms: no endurezcas, no endurezca.