pygmy: [14] Greek pugmé meant ‘fist’ (it may have been related to Latin pugnus ‘fist’, source of English pugnacious). By extension, it was used for a ‘measure of length equal to the distance from the elbows to the knuckles’. From it was derived pugmaíos ‘dwarfish’, which passed into English via Latin pygmaeus. In ancient and medieval times it was used as a noun to designate various apocryphal or mythical races of short stature, but it was not until the late 19th century that it was applied to the people of equatorial Africa who now bear the name. => pugnacious[pygmy etymology, pygmy origin, 英语词源]