c. 1600, "a person in despair;" 1640s, "a desperate or reckless man;" mock-Spanish version of desperate (n.) "reckless criminal" (1560s), from Latin desperatus "given up, despaired of," past participle of desperare (see despair (v.)). There was an adjective desperado in Old Spanish, meaning "out of hope, desperate," but apparently it never was used as a noun and it probably has nothing to do with the English word.
"tree of the genus Platanus," native to Persia and the Levant, late 14c., from Old French plane, earlier plasne (14c.), from Latin platanus, from Greek platanos, earlier platanistos "plane tree," a species from Asia Minor, associated with platys "broad" (from PIE root *plat- "to spread") in reference to its leaves. Applied since 1778 in Scotland and northern England to the "sycamore" maple (mock-plane), whose leaves somewhat resemble those of the true plane tree. Compare sycamore.
early 14c., "black" as a heraldic color, commonly identified with sable (n.1) and in many dictionaries they form one entry, but the animal's fur is brown (though generally darker than the fur of other animals) and this might be a different word of unknown origin, or it might reflect a medieval custom (unattested) of dyeing sable black. As an adjective from late 14c. Emblematic of mourning or grief from late 14c.; by c. 1800 as "black" with reference to Africans and their descendants, often in mock dignity.
1530s, "scullion, kitchen knave," of uncertain origin. Perhaps in reference to military units or attendants so called for the color of their dress or their character; more likely originally a mock-military reference to scullions and kitchen-knaves of noble households, of black-liveried personal guards, and of shoeblacks. See black (adj.) + guard (n.). By 1736, sense had emerged of "one of the idle criminal class; man of coarse and offensive manners." Hence the adjectival use (1784), "of low or worthless character."
"deceive, impose upon, mislead the mind or judgment of," c. 1400, from Latin deludere "to play false; to mock, deceive," from de- "down, to one's detriment" (see de-) + ludere "to play" (see ludicrous). Related: Deluded; deluding.
Mislead means to lead wrong, whether with or without design. Delude always, at least figuratively, implies intention to deceive, and that means are used for that purpose. We may be misled through ignorance and in good faith, but we are deluded by false representations. A person may delude himself. [Century Dictionary]