How to Say "to terminate" in Spanish
The Spanish word for “to terminate” is “finalizar” — B1 level. This is a very common word in everyday Spanish.

Examples
La película finaliza a las nueve de la noche.
The movie ends at nine p.m.
Necesito finalizar este informe antes de la reunión.
I need to finish this report before the meeting.
El árbitro decidió finalizar el partido por la lluvia.
The referee decided to end the match because of the rain.
The Z to C Spelling Swap
In Spanish, 'z' usually changes to 'c' when followed by an 'e'. This happens in the 'yo' form when talking about the past (finalicé) and in commands or wishes (que finalice).
Finalizar vs. Terminar
While both mean 'to finish,' finalizar is more formal. Use 'terminar' for everyday things like a meal, and 'finalizar' for official events or work tasks.
The 'Yo' Form Past Spelling
Mistake: “Yo finalizé la tarea.”
Correction: Yo finalicé la tarea. (Remember that 'z' always becomes 'c' before an 'e' in Spanish spelling!)
Using it for People
Mistake: “Mi abuelo finalizó ayer.”
Correction: Mi abuelo murió/falleció ayer. (Finalizar is for events and tasks, not for people passing away.)
Related Translations
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