Etymology
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topaz (n.)

colored crystalline gem, late 13c., from Old French topace (11c.), from Latin topazus (source also of Spanish topacio, Italian topazio), from Greek topazos, topazion, of obscure origin. Pliny says it was named for a remote island in the Red or Arabian Sea, where it was mined, the island so named for being hard to find (from Greek topazein "to divine, to try to locate"); but this might be folk etymology, and instead the word might be from the root of Sanskrit tapas "heat, fire." In the Middle Ages used for almost any yellow stone. To the Greeks and Romans, possibly yellow olivine or yellow sapphire. In modern science, fluo-silicate of aluminum. As a color name from 1908.

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camel (n.)

"large ruminant quadruped used in Asia and Africa as a beast of burden," Old English camel, perhaps via Old North French camel (Old French chamel, Modern French chameau), from Latin camelus, from Greek kamelos, from Hebrew or Phoenician gamal, perhaps related to Arabic jamala "to bear."

Another Old English word for the beast was olfend, apparently based on confusion of camels and elephants in a place and time when both were unknown but for travelers' vague descriptions. The confusion was general in the older Germanic languages (Gothic ulbandus, Old High German olbenta, Old Saxon olbhunt, Old Norse ulfaldi). Also compare camelopard. Of the two distinct species, the Arabian has one hump (the lighter, thoroughbred variety is the dromedary); the Bactrian has two. The camel-walk dance style is recorded from 1919.

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sesame (n.)

early 15c., sisamie, "annual herbaceous plant cultivated primarily for its seeds," probably from Latin sesamum (nominative sesama), from Greek sēsamon (Doric sasamon) "seed or fruit of the sesame plant," a very early borrowing via Phoenician from Late Babylonian *shawash-shammu (compare Assyrian shamash-shammu "sesame," literally "oil-seed"). Medieval Latin had it as sisaminum; Old French as sisamin.

It first appears in English as a magic charm in a 1722 translation of Galland's "Mille et une nuits," where it causes the door of the thieves' den in "Ali Baba and the Forty Thieves" to fly open. It began to be used in contexts outside the Tales by 1790s.

A warehouse, a shop, or more generally a stable, is under every private dwelling-house. When you ring the bell, the door is opened by a long string from above ; like the "Open Sesame," in the Arabian Tales. [Southey, "Letters Written During a Short Residence in Spain and Portugal," 1799]
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phoenix (n.)

mythical bird of great beauty worshiped in Egypt, Old English and Old French fenix, from Medieval Latin phenix, from Latin phoenix, from Greek phoinix. The bird was the only one of its kind, ans after living 500 or 600 years in the Arabian wilderness, "built for itself a funeral pile of spices and aromatic gums, lighted the pile with the fanning of its wings, and was burned upon it, but from its ashes revived in the freshness of youth" [Century Dictionary]. 

Ðone wudu weardaþ wundrum fæger
fugel feþrum se is fenix hatan
["Phoenix," c.900]

Compare Phoenician, which seems to be unrelated. Forms in ph- begin to appear in English late 15c. and the spelling was assimilated to Greek in 16c. (see ph). Figurative sense of "that which rises from the ashes of what was destroyed" is attested from 1590s.

The constellation was one of the 11 added to Ptolemy's list in the 1610s by Flemish cartographer Petrus Plancius (1552-1622) after Europeans began to explore the Southern Hemisphere. The city in Arizona, U.S., was so called because it was founded in 1867 on the site of an ancient Native American settlement.

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