PIE *weid, seeから。語源的にはvision, wiseと同じ。 ゲルマン語のw音はロマンス諸語では通常guと発音される。
英語の語源
guide
guide: [14] The ancestor of guide was Germanic *wit- ‘know’, source of English wise, wit, and witness. From it was derived a verb *wītan, and the Franks, a West Germanic people who conquered Gaul in the 3rd and 4th centuries AD, brought it with them. It eventually became Old French guider, and was borrowed by English. The semantic progression from ‘knowing’ to ‘showing’ is also displayed in the related German weisen ‘show, direct, indicate’. => wise, wit, witness
guide (v.)
late 14c., "to lead, direct, conduct," from Old French guider "to guide, lead, conduct" (14c.), earlier guier, from Frankish *witan "show the way" or a similar Germanic source, from Proto-Germanic *witanan "to look after, guard, ascribe to, reproach" (cognates: German weisen "to show, point out," Old English witan "to reproach," wite "fine, penalty"), from PIE *weid- "to see" (see vision). The form of the French word influenced by Old Proven?al guidar (n.) "guide, leader," or Italian guidare, both from the same source. Related: Guided; guiding. Guided missile, one capable of altering course in flight, is from 1945.
guide (n.)
mid-14c., "one who shows the way," from Old French guide, 14c., verbal noun from guider (see guide (v.)). In book titles from 1610s; meaning "book of information on local sites" is from 1759. In 18c. France, a "for Dummies" or "Idiot's Guide to" book would have been a guid' ane, literally "guide-ass." Guide-dog for the blind is from 1932.
例文
1. This is it，folks：the best record guide in the business.
これだ、みんな、業界最高のレコードガイド。
2.A guide gives a brief talk on the history of the site.
ガイドはその遺跡の歴史を簡単に紹介した。
3.The guide book contains a short write-up of each hotel.
ガイドには、各ホテルに対する簡単なコメントが記載されています。
4.The national curriculum must be a guide ，not a straitjacket.
ナショナルコース設定は、制約ではなく指導的でなければなりません。
5.The new e-books will include a host of Rough Guide titles.