なna-adjective
sudden
kyuugekida
meaning: is sudden
state
feeling
examples
今年の値上がり、急激だよね。
kotoshi no neagari, kyuugeki da yo ne.
This year's price rises are so sharp. casual
この十年の人口減少は急激です。
kono juunen no jinkou genshou wa kyuugeki desu.
The fall in population over these ten years has been sharp. neutral