1) 急速きゅうそく #5,675 Inflections of 急速 Class Na-adjective Stem Inflected ending ✕ Link copied! Common きゅうそく [0] Meaning Shirabe Na-adjective Noun rapid (e.g. progress) コンピューターは急速きゅうそくな進化しんかを遂とげた。 Computers have made rapid progress. Kanji 急 キュウ hurry, emergency, sudden 速 ソク quick, fast Forms 急速#5,675急速きゅうそくきゅうそくきゅうそく Learn this word with smart reviews that adapt to you Save word