fastness

n fortified place that is easily defended; stronghold 堡垒; 要塞: a mountain fastness 山寨.

fascinate, fascinating, fascinatingly, fascination, fascism, fascism (also Fascism), fascist, fascist (also Fascist), fashion, fashionable, fashionably, fast, fast food, fast time, fast-talk, fasten, fastener, fastidious, fastidiously, fastidiousness, fat, fat cat, fat-head, fatal, fatalism, fatalist, fatalistic, fatality, fatally, fate, fateful, fatefully, father, Father Christmas, Father Time, father-figure, father-in-law, fatherhood, fatherland, fatherly,