This is the 1215th most frequent Spanish word.
índice
"Índice" in English means "index" or "indicator."
Here, 'índice' refers to the table of contents or index in a book, indicating its use as a noun describing a part of a publication.
El índice del libro está al principio.
The index of the book is at the beginning.
In this sentence, 'índice' is used to describe a statistical figure or rate, showing its usage in economic or numerical contexts.
El índice de inflación ha aumentado este año.
The inflation rate has increased this year.
This use of 'índice' suggests a measure or level concerning a certain subject, illustrating its application as an indicator or level of significance.