el último

The Spanish word "último" means "last" or "final." It is used to refer to something that comes at the end of a sequence or a series.

Synonyms for "último" include "final" and "postrero." The difference between them is subtle:

• "Final" often implies a conclusion or last part in a broader context (like a final exam or the final decision), while "último" can denote the last item in a series without necessarily implying a conclusion.
• "Postrero" is an archaic term used more in literary contexts, typically referring to the last in terms of time or order, but it’s less common in everyday speech.

Overall, while they can often be used interchangeably, the nuances depend on the specific context.