adumbrate (v. t.)
To give a faint shadow or slight representation of; to outline; to shadow forth. Metaphorically, to give a rough outline of, to explain at a high level.
Depending on chance, something that can’t be anticipated.
To heat and cool in order to temper or toughen a material. Alternately to fire something to keep its color.
One, having no match, not one of a pair.
A figure by which one word is wrongly put for another, or by which a word is wrested from its true signification.
chatoyant (a. (or noun if you mean the mineral))
Having a changeable, varying luster, or color, like that of a changeable silk, or of a cat’s eye in the dark.
Old English efte, efeta “small lizard-like animal,” of unknown origin (see newt).
“squirrel fur,” or some other kind of fur in use in the Middle Ages, c. 1300, from Old French vair “two-toned squirrel fur; fur garments” (12c.), from Latin varium, masculine accusative singular of varius “parti-colored” (see vary). Gray or black above and white below.