feral

adj. 野生的,凶猛的

felspar, felt, felt-pen, felucca, fem, female, feminine, femininity, feminism, feminist, femme fatale, femoral, femur, fen, fence, fencer, fencing, fend, fender, fennel, ferment, fermentation, fern, ferny, ferocious, ferociously, ferocity, ferret, Ferris wheel, ferroconcrete, ferrous, ferrule, ferry, ferry-boat, ferryboat, ferryman, fertile, fertility, fertilization, fertilisation, fertilize,