急速(きゅうそく)に きゅうそくに adverb rapidly; quickly writtenchange 1. rapidly; quickly; at a fast pace Describes something happening or changing at a noticeably fast rate. Often used in news and academic writing about trends and developments. 人口(じんこう)が急速(きゅうそく)に増(ふ)えている。🔊 The population is increasing rapidly. 技術(ぎじゅつ)は急速(きゅうそく)に進歩(しんぽ)している。🔊 Technology is advancing rapidly. 少子化(しょうしか)の影響(えいきょう)で、地方(ちほう)の人口(じんこう)が急速(きゅうそく)に減少(げんしょう)している。🔊 Due to the declining birthrate, the population in rural areas is decreasing rapidly. Common in news and formal writing about trends and developments.Common collocations急速(きゅうそく)に発展(はってん)する: to develop rapidly急速(きゅうそく)に広(ひろ)まる: to spread rapidly急速(きゅうそく)に変化(へんか)する: to change rapidly急速(きゅうそく)な変化(へんか): rapid change (the な-adjective form)Similar words急激(きゅうげき)に: sharply, abruptly — stresses suddenness, often an unwelcome jolt速(はや)く: quickly — the everyday word for any action; 急速(きゅうそく)に is for processes and trends, not for running or eating Related Words Compare: みるみる (rapidly) Compare: 急激(きゅうげき)に (rapidly) Compare: 速(はや)い／早(はや)い (quickly) general Added 2026.3.24 18:31 · Revised 2026.9.30 22:08 19000/19077_kyuusokuni