From the word’s history
From Middle English sodeyn, via Anglo-Norman and Old French sodain, from Latin subitāneus, from subitus 'come stealthily', from sub 'under' + īre 'go'.
經古法文 sodain，來自拉丁文 subitus「悄悄來到的」。
Picture a quiet room and then a door slamming. Two things happen at once: it was fast, and nothing led up to it. That second part is what really carries the word — a slow thing can still be sudden if it arrives with no warning, and a fast thing you were expecting is not sudden at all.
原始詞典資料5 筆記錄
以下是外部詞典記錄的用法，摘錄並精簡格式，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
suddenadj/ˈsʌd.ən/
- 1
Occurring quickly with little or no warning or expectation; instantly.
- The sudden drop in temperature left everyone cold and confused.
- From lightninges and tempeſtes, from plage, peſtilence, and famine, from battayle and murther, and from ſodayn death. / Good lord deliver us.
- 2
obsoleteHastily prepared or employed; quick; rapid.
- Never was such a sudden scholar made.
- Thus these pious flourishes and colours, examined thoroughly, are like the apples of Asphaltis, appearing goodly to the sudden eye; but look well upon them, or at least but touch them, and they turn into cinders.
- 3
obsoleteHasty; violent; rash; precipitate.
- I have no joy of this contract to-night: / It is too rash, too unadvised, too sudden;
suddenadv/ˈsʌd.ən/
- 1
Suddenly.
- Herbs of every leaf that sudden flowered.
suddennoun/ˈsʌd.ən/
- 1
obsoleteAn unexpected occurrence; a surprise.
摘錄自 英文維基詞典 English Wiktionary，已精簡格式；依 CC BY-SA 4.0 授權使用，改動後的內容同樣以此授權提供。