lustr-, lust- (Latin: light up, shine).illustrate: 
1. To shed light upon, light up, illumine.  
2. To clarify something by giving examples or making comparisons so as to "throw the light of intelligence upon; to make clear, elucidate, clear up, explain". 2. To provide explanatory or decorative pictures to accompany a printed, spoken, or electronic text. 3. To elucidate (a description, etc.) by means of drawings or pictures; to ornament (a book, etc.) in this way with elucidatory designs. Said also of the pictures themselves. illustration: 
An example or comparison that helps to clarify or explain something.  
2. The art or process of producing or providing pictures to accompany a text. 3. The action or fact of making clear or evident to the mind; setting forth clearly or pictorially; elucidation; explanation; exemplification. illustrative, illustratively: 
 Serving or tending to illustrate, make clear or elucidate; explanatory, elucidatory; affording an illustration or example; exemplificatory.
 
illustrator: 
Someone who gives or draws illustrations; the artist who illustrates a book or periodical.
 
illustrious, illustriously: 
1. Extremely distinguished and deservedly famous.  
2. Possessing luster by reason of high birth or rank, noble or lofty action or qualities; distinguished, eminent; renowned, famous. luster: 
1. A soft sheen of reflected light, especially from metal that has been polished gently.  
2. A bright and shiny condition or tone. 3. The glory and magnificence of a great achievement. 4. A chandelier or candelabrum made of cut glass, designed to reflect the light. 5. The quality and amount of light reflected from the surface of a mineral. This is one of the ways in which a mineral is defined, the highest degree of luster being "splendent". 6. Luminosity, brilliancy, bright light; luminous splendor. lustral: 
Serving to purify the spirit, or relating to ceremonies of religious purification. See lustrum for probable etymology.
 
lustrate: 
To make someone or something spiritually pure by means of a special religious ceremony.
 
lustrify: 
To make lustrous.
 
lustrine: 
A glossy silk fabric.
 
lustrous: 
With a soft shine, sheen, or gloss.
 
lustrum: 
Historically, the purification of the entire ancient Roman people, taking place every five years after the census. From Latin, "purification"; probably ultimately from an Indo-European word meaning "light, bright." The various phases of the sense development of lustrum may probably be as follows: "illumination, inspection, review, mustering, expiatory offering, expiation." [According to Dr. Ernest Klein in his A Comprehensive Etymological Dictionary of the English Language.]
 
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