feudal

a.封建的

festal, fester, festival, festive, festivity, festoon, fetal, fetch, fetching, fetchingly, fete, fetid, fetish, fetishism, fetishist, fetlock, fetter, fettle, fetus, feud, feudalism, feudalistic, fever, fevered, feverish, few, fewer, fey, feyness, fez, ff, fianc, fiance, fiance (fem 阴性作 fiancee), fiasco, fiat, fib, fiber, fibre, fibre (US fiber),