What are the definitions of these words. Chivalrous Facile Repose Assent Indomitable

Chivalrous- courteous and gallant towards women mainly
Facile- neat, organized
Repose- state of rest/sleep
Assent- approval or agreement
Indomitable- impossible to defeat
Pungent- having a sharp strong taste or smell
Temerity- confidence/boldness
Virulent- extremely severe
Benefactor- a person who donates to help a person or a cause
Dearth- scarcity/lack of something

(Hope this helps. Please give if you can)

"variety, light, spectrum of colors"

Explanation:

The words that provide the best context clues for the meaning of "iridescent" are "variety, light, spectrum of colors".

Iridescent has to do with variety of colors that changes in different types of light or angles of light. The colors are usually shining, bright and lustrous. The word is coined to mean rainbow-like colors - a spectrum of colors.

Therefore, "variety, light, spectrum of colors" actually provides the best context clues.