fortyoudaoicibaDictYouDict[fort 词源字典]
fort: [15] Etymologically, a fort is a ‘strong place’. The word comes either from Old French fort or from Italian forte, both noun uses of an adjective descended from Latin fortis ‘strong’. A similar semantic result, but achieved by derivation rather than conversion, can be seen in fortress [13], a borrowing from Old French forteresse, which goes back to Vulgar Latin *fortaritia, a derivative of Latin fortis. (The nearest native English equivalent of both words is stronghold.) Other words inherited by English from fortis include fortify [15], fortitude [15], the noun forte ‘strong point’ [17] (it was borrowed, despite its modern Italianate pronunciation, from French fort, and was subsequently remodelled on the French feminine form forte), and the musical direction forte ‘loud’ [18] (from Italian), which appears also in pianoforte.
=> force, fortify, fortress[fort etymology, fort origin, 英语词源]
fort (n.)youdaoicibaDictYouDict
mid-15c., "fortified place, stronghold," from Old French fort "fort, fortress; strong man," noun use of adjective meaning "strong, stout, sturdy; hard, severe, difficult; hard to understand; dreadful, terrible; fortified" (10c.), from Latin fortis "strong, mighty; firm, steadfast; brave, spirited," from Old Latin forctus, possibly from PIE root *bhergh- (2) "high, elevated," with derivatives referring to hills and hill-forts (see barrow (n.2)). Or possibly from *dher- (2) "to hold firmly, support." Figurative use of hold the fort attested from 1590s.