Everglades (n.)youdaoicibaDictYouDict
1826, from everglade (1823), from ever, apparently in sense of "endless" + glade. Charles Vignoles's "Observations upon the Floridas" (1823) has Eternal Glades and Ever Glade morass.
The distance from the mouth of Hilsborough river to the head of the lake, in a direct line, is about 110 statute miles. The country between them is mostly, if not wholly, an everglade, by which is meant a low marsh frequently covered with water, and in which there grows a sharp triangular grass, from ten to twelve feet high, and impervious to men or animals. ["American Mechanics' Magazine," 1825]
mile (n.)youdaoicibaDictYouDict
Old English mil, from West Germanic *milja (cognates: Middle Dutch mile, Dutch mijl, Old High German mila, German meile), from Latin milia "thousands," plural of mille "a thousand" (neuter plural was mistaken in Germanic as a fem. singular), of unknown origin.

The Latin word also is the source of French mille, Italian miglio, Spanish milla. The Scandinavian words (Old Norse mila, etc.) are from English. An ancient Roman mile was 1,000 double paces (one step with each foot), for about 4,860 feet, but there were many local variants and a modern statute mile is about 400 feet longer. In Germany, Holland, and Scandinavia in the Middle Ages, the Latin word was applied arbitrarily to the ancient Germanic rasta, a measure of from 3.25 to 6 English miles. Mile-a-minute (adj.) "very fast" is attested from 1957.