ferocity

n. 凶猛，残暴

femininity, feminism, feminist, femme fatale, femoral, femur, fen, fence, fencer, fencing, fend, fender, fennel, feral, ferment, fermentation, fern, ferny, ferocious, ferociously, ferret, Ferris wheel, ferroconcrete, ferrous, ferrule, ferry, ferry-boat, ferryboat, ferryman, fertile, fertility, fertilization, fertilisation, fertilize, fertilize, fertilise, fertilizer, fertilizer, fertiliser, fervent, fervently, fervid, fervidly,