Etymology
Advertisement
riches (n.)

"valued possessions, money, property, abundance of means, state of having large or valuable possessions," modified from richesse (c. 1200), a singular form misunderstood as a plural, from Old French richesse, richece "wealth, opulence, splendor, magnificence," from riche (see rich (adj.)). The Old French suffix -esse is from Latin -itia, added to adjectives to form nouns of quality (compare fortress). The spelling shift was evident by 15c.

Related entries & more 
Advertisement
laches (n.)

"negligence in performance of legal duty," 1570s, earlier simply "slackness, negligence, want of zeal" (late 14c.), from Anglo-French laches, Old French lachesse "lawlessness, remissness," from Old French lasche "lax, remiss" (Modern French lâche), verbal adjective from lascher, from Vulgar Latin *lascare, classical laxare "to slacken, relax," from laxus "loose; yielding; indulgent" (from PIE root *sleg- "be slack, be languid"). Compare riches.

Related entries & more 
fortress (n.)

early 14c., from Old French forteresse, forterece "strong place, fortification" (12c.), variant of fortelesse, from Medieval Latin fortalitia, from Latin fortis "strong" (see fort) + -itia, added to adjectives to form nouns of quality or condition. French -ess from Latin -itia also is in duress, largesse, riches, also obsolete rudesse, "lack of cultivation" (early 15c.).

For change of medial -l- to -r- in Old French, compare orme "elm" from Latin ulmus; chartre from cartula; chapitre from capitulum.

Related entries & more 
opulence (n.)

"wealth, riches, affluence," c. 1500, from French opulence (16c.), from Latin opulentia "riches, wealth," from opulentus "wealthy," a dissimilation of *op-en-ent-, which is related to ops "wealth, power, ability, resources," and to opus "work, labor, exertion" (from PIE root *op- "to work, produce in abundance").

Opulence is a dignified and strong word for wealth. Wealth and riches may mean the property possessed, and riches generally does mean it; the others do not. Affluence suggests the flow of wealth to one, and resulting free expenditure for objects of desire. There is little difference in the strength of the words.  [Century Dictionary, 1895]
Related entries & more 
Lakshmi 

Hindu goddess of beauty, said to be from Sanskrit lakshmi "mark, fortune, riches, beauty."

Related entries & more 
Advertisement
Mammon (n.)

personification of riches and worldliness, mid-14c., from Late Latin mammona, from Ecclesiastical Greek mamōnas, from Aramaic mamona, mamon "riches, gain;" a word left untranslated in Greek New Testament (Matthew vi.24, Luke xvi.9-13), retained in the Vulgate, and regarded mistakenly by medieval Christians as the name of a demon who leads men to covetousness.

Related entries & more 
wealth (n.)

mid-13c., "happiness," also "prosperity in abundance of possessions or riches," from Middle English wele "well-being" (see weal (n.1)) on analogy of health.

Related entries & more 
Croesus 

from Latinized form of Greek Kroisos, 6c. B.C.E. king of Lydia in Asia Minor, famously wealthy; hence, from late 14c., "rich man" or in other allusions to riches.

Related entries & more 
Edwin 

masc. proper name, from Old English Ead-wine, literally "prosperity-friend, friend of riches," from ead "wealth, prosperity, joy" (see Edith) + wine "friend, protector" (related to winnan "to strive, struggle, fight;" see win (v.)).

Related entries & more 
plutocrat (n.)

"person who rules or sways a community or society by virtue of his wealth; person possessing power or influence solely or mainly on account of his riches," 1838, a back-formation from plutocracy. Related: Plutocratic (1843); plutocratical (1833).

Related entries & more