Etymology
moor (v.)

"to fasten (a ship) in a particular location by or as by cables, anchors, etc.," late 15c., probably related to Old English mærels "mooring rope," via unrecorded *mærian "to moor," or possibly borrowed from Middle Low German moren or Middle Dutch maren "to moor," from West Germanic *mairojan. Related: Moored, mooring. French amarrer is from Dutch.

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moor (n.)

"tract of open, untilled, more or less elevated ground, often overrun with heath," c. 1200, from Old English mor "morass, swamp," from Proto-Germanic *mora- (source also of Old Saxon, Middle Dutch, Dutch meer "swamp," Old High German muor "swamp," also "sea," German Moor "moor," Old Norse mörr "moorland," marr "sea"), perhaps related to mere (n.1), or from root *mer- "to die," hence "dead land."

The basic sense in place names is 'marsh', a kind of low-lying wetland possibly regarded as less fertile than mersc 'marsh.' The development of the senses 'dry heathland, barren upland' is not fully accounted for but may be due to the idea of infertility. [Cambridge Dictionary of English Place-Names]

Hence moor-fowl "grouse" (c. 1500); moor-hen (mid-14c.); moor-cock (c. 1200 as a surname).

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Moro 
"Muslim Malay of the Philippines," 1886, from Spanish Moro, literally "Moor" (see Moor).
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moorland (n.)

"tract of waste land," Old English morlond; see moor (n.) + land (n.).

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blackamoor (n.)
"dark-skinned person, black-skinned African," 1540s, from black (adj.) + Moor, with connecting element.
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unmoor (v.)
late 15c., "to free from moorings," from un- (2) "reverse, opposite of" + moor (v.). Related: Unmoored.
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Morisco (adj.)

"of or pertaining to Moors, Moorish, of Moorish design," 1550s, from Spanish morisco, from Moro (see Moor), and compare Moresco.

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mooring (n.)

early 15c., "action or process of making a ship secure in a particular place by means of anchors, cables, etc.," verbal noun from moor (v.). From 1775 as "place where a vessel can be moored" (compare moorings). 

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Moresco (adj.)

"Moorish, of Moorish design or imitation of Moorish work," 1550s, from Italian moresco, from Moro (see Moor). As a type of Italian dance, 1620s. Compare Morisco, which is the Spanish form.

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Moorish (adj.)

"of or pertaining to the Moors," mid-15c., moreis, morys, morreys, from Moor + -ish. Earlier was Moreske (mid-14c.), from Old French moresque, morisque. Also compare Morisco, Moresco.

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