fraughtyoudaoicibaDictYouDict[fraught 词源字典]
fraught: [14] Fraught and freight [15] are related, and share the underlying meaning ‘load’. But whereas freight has stayed close to its semantic roots, fraught, which started out as ‘laden’, has moved on via ‘supplied or filled with something’ to specifically ‘filled with anxiety or tension’. It was originally the past participle of a now obsolete verb fraught ‘load a ship’, which was borrowed from Middle Dutch vrachten.

This in turn was a derivative of the noun vracht ‘load, cargo’, a variant of vrecht (from which English gets freight). Both vracht and vrecht probably go back to a prehistoric Germanic noun *fraaikhtiz, whose second element *-aikhtiz is related to English owe and own.
=> freight[fraught etymology, fraught origin, 英语词源]
fraught (adj.)youdaoicibaDictYouDict
late 14c., "freighted, laden, loaded, stored with supplies" (of vessels); figurative use from early 15c.; past participle adjective from obsolete verb fraught "to load (a ship) with cargo," Middle English fraughten (c. 1400), which always was rarer than the past participle, from noun fraught "a load, cargo, lading of a ship" (early 13c.), which is the older form of freight (n.).

This apparently is from a North Sea Germanic source, Middle Dutch vrecht, vracht "hire for a ship, freight," or similar words in Middle Low German or Frisian, apparently originally "earnings," from Proto-Germanic *fra-aihtiz "property, absolute possession," from *fra-, here probably intensive + *aigan "be master of, possess" (see owe (v.)). Related: Fraughtage.