groinyoudaoicibaDictYouDict
groin: [15] Unravelling the history of groin required a good deal of detective work, and the answer that the 19th-century etymologist Walter Skeat came up with was the rather surprising one that it is related to ground. The root on which this was formed was prehistoric Germanic *grundu-, which also produced the derivative *grundja-. This passed into Old English as grynde, which seems originally to have meant ‘depression in the ground’ (although the more extreme ‘abyss’ is its only recorded sense).

It appears to correspond to Middle English grynde ‘groin’ (‘If the pricking be in the foot, anoint the grynde with hot common oil’, Lanfranc’s Science of Surgery 1400 – evidently an example of reflexology), and the theory is that the original sense ‘depression in the ground’ became transferred figuratively to the ‘depression between the abdomen and the thighs’.

By the late 15th century grynde had become gryne, and (by the not uncommon phonetic change of /ee/ to /oi/) this metamorphosed to groin in the late 16th century. (Groyne ‘wall projecting into the sea’ [16] is a different word. It is a transferred use of the now obsolete groin ‘pig’s snout’ [14], which came via Old French groin from Latin grunnīre ‘grunt’.)
maverickyoudaoicibaDictYouDict
maverick: [19] Originally, in the American West, a maverick was an unbranded calf that had become separated from its mother and its herd (by convention, any farmer or stockman who came upon such a calf could add it to his herd and brand it as his own). The name probably comes from Samuel Augustus Maverick (1803– 70), a Texas cattle-owner (and ancestor of the Maury Maverick who coined the word gobbledegook) who did not brand the calves of one of his herds. The familiar modern metaphorical application to an awkwardly independent-minded person was in place before the end of the 19th century.
SenecayoudaoicibaDictYouDict
1610s, from Dutch Sennecas, collective name for the Iroquois tribes of what became upper New York, of uncertain origin, perhaps from a Mahican name for the Oneida or their village. Earlier sinnekens, senakees; form probably influenced by the name of the ancient Roman philosopher.