wideyoudaoicibaDictYouDict[wide 词源字典]
wide: [OE] Wide is a general Germanic word, with relatives in German weit, Dutch wijd, and Swedish and Danish vid. All are descended from prehistoric Germanic *wīdaz, which may go back ultimately to the Indo-European base *wi- ‘apart, away’ (source also of Sanskrit vitarám ‘further’). Width was coined in the early 17th century, probably on the analogy of breadth.
[wide etymology, wide origin, 英语词源]
wide (adj.)youdaoicibaDictYouDict
Old English wid "vast, broad, long," also used of time, from Proto-Germanic *widaz (cognates: Old Saxon, Old Frisian wid, Old Norse viðr, Dutch wijd, Old High German wit, German weit), perhaps from PIE *wi-ito-, from root *wi- "apart, away, in half."

Meaning "distended, expanded, spread apart" is from c. 1500; sense of "embracing many subjects" is from 1530s; meaning "missing the intended target" is from 1580s. As a second element in compounds (such as nationwide, worldwide) meaning "extending through the whole of," is is from late Old English. As an adverb, Old English wide. Wide open "unguarded, exposed to attack" (1915) originally was in boxing, etc. Wide awake (adj.) is first recorded 1818; figurative sense of "alert, knowing" is attested from 1833.