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A citadel is a strong fortress, usually built on high ground, to protect and defend a city - the last safe place if the rest of the city falls. The word is also used to describe a place seen as a strong centre of something, like 'a citadel of learning' for a famous old university.
城堡、堡壘；(比喻)重要據點
組成From Italian cittadella, 'little city' - citta (city) + -della (a small-size ending).
同家族的字
- citycitadel comes through Italian citta, which shares the same Latin root as 'city'
原始詞典資料4 筆記錄
以下是外部詞典記錄的用法，原文照列，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。
citadelnoun/ˈsɪtədəl/
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A strong fortress that sits high above a city.
- In the city’s midst the gleaming marble of a thousand steps climbed to the citadel where arose four pinnacles beckoning to heaven, and midmost between the pinnacles there stood the dome, vast, as the gods had dreamed it.
- 2
A stronghold or fortified place.
- Intrenched within the citadel of our apartment, and cheered by the comfortings of a coal fire, we passed the day in letter-writing, conversation, or gazing from the sheltered security of our windows upon the agitated sea[…]
- 3
An armoured portion of a warship, housing important equipment.
- Twenty-two of these — eleven per broadside — were on the main deck within a central citadel, essentially an armor-protected box in the middle of the ship. Also within the citadel were four 110-pdr. breech-loaders.
- 4
A Salvation Army meeting place.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。