相关单词近义词adj. quick, rapid, secure, solid, speedy, swift, tight adv. firmly like a flash, quickly, rapidly, securely, speedily, swiftly, tightly反义词adj.crawling, dull, insecure, loose, slow临近词fasten, fashionable, Fastr, FASTN, Fasta, Fasti, Fasth, Fastje, Fastum, Fastio, faster, Fastow 返回 fasts