げきげん
dramatic decrease; sharp drop; sudden fall
Common word
Noun, Suru verb, Intransitive
先進国せんしんこくでは虫歯むしばが激減げきげんし、自分じぶんの歯はで一生いっしょう食たべられる人ひとが増ふえています。
Cavities have become rarer in the developed countries and more people will be able to eat with their own teeth throughout their life.