"power, authority, supernatural power," 1843, from Maori, "power, authority, supernatural power."
Old English glof "glove, covering for the hand having separate sheaths for the fingers," also "palm of the hand," from Proto-Germanic *galofo "covering for the hand" (source also of Old Norse glofi), probably from *ga- collective prefix + *lofi "hand" (source also of Old Norse lofi, Middle English love, Gothic lofa "flat of the hand"), from PIE *lep- (2) "be flat; palm, sole, shoulder blade" (source also of Russian lopata "shovel;" Lithuanian lopa "claw," lopeta "shovel, spade").
German Handschuh, the usual word for "glove," literally "hand-shoe" (Old High German hantscuoh; also Danish and Swedish hantsche) is represented by Old English Handscio (the name of one of Beowulf's companions, eaten by Grendel), but this is attested only as a proper name. Meaning "boxing glove" is from 1847. Figurative use of fit like a glove is by 1771.
early 15c., puissaunce, "power, strength, authority," from Old French puissance, poissance "power, might" (12c.), from puissant (see puissant).
also horse-power, unit for measurement of the rate at which a motor works, 1805, from horse (n.) + power (n.); established by Watt as the power needed to lift 33,000 pounds one foot in one minute, which actually is about 1.5 times the power of a strong horse. Much abused in 19c. technical writing as "very fallacious," "shockingly unscientific," etc.