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

Examples
Por favor, haz una síntesis de la reunión.
Please, make a summary of the meeting.
Su libro es una síntesis de la historia europea.
His book is a synthesis of European history.
La capacidad de síntesis es muy importante para un periodista.
The ability to summarize is very important for a journalist.
One Form for All
This word doesn't change when it becomes plural. You say 'la síntesis' for one and 'las síntesis' for many.
The Stress Mark
The accent on the 'í' is mandatory because the voice naturally hits the third-to-last syllable (this is called an 'esdrújula' word).
Plural Error
Mistake: “las síntesises”
Correction: las síntesis. The word ends in 's' and the stress is on the third-to-last syllable, so we don't add more letters to make it plural.
Other Meanings of “síntesis”
“síntesis” can also mean:
- chemical or biological production(B2, formal)
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