fustian

n [U] 1 thick strong coarse cotton cloth 厚而结实的粗棉布; 粗斜纹布: a jacket (made) of fustian 粗斜纹布（制成）的甲克 * [attrib 作定语] a fustian jacket 粗斜纹布甲克. 2 (dated derog 旧, 贬) talk that sounds impressive but is in fact empty and worthless; bombast 空洞无物的吹嘘; 夸夸其谈.

furthermost, furthest, furtive, furtively, furtiveness, fury, furze, fuse, fuse wire, fuse-box, fuselage, fusible, fusilier, fusillade, fusion, fuss, fussily, fussiness, fusspot, fussy, fustiness, fusty, futile, futility, future, futures, futurism, futurist, futuristic, futurity, fuzz, fuzzily, fuzziness, fuzzy, fwd, g, G, g, G-string, gab, gabardine (also gaberdine),