onset

始まり、到来

何かが始まる時点。好ましくないことに使う場合が多い。

やさしい英語で： The time when something starts, often something unpleasant.

• The onset of winter brought snow.
• They left before the onset of darkness.
• The onset of puberty varies from child to child.

使い方： onset of something (The onset of heavy rain delayed the match.)

類義語： beginning, start

反対語： end

よく使う表現： onset of something, at the onset, sudden onset

発症

病気や不調の症状が現れ始める最初の段階。

やさしい英語で： The first stage of an illness or condition, when its signs start to appear.

• The onset of symptoms was sudden.
• Early onset of the disease can affect school life.
• She recorded the time of onset in the medical notes.

使い方： onset of something (The onset of fever may be the first warning.)

類義語： beginning

よく使う表現： disease onset, early onset, onset of symptoms