Word
arcanum
秘密；奥秘
information known only to a special group; a secret
- 1.
A mystery or deep secret.
一个谜或深奥的秘密。
- 2.
An elixir or secret remedy.
一种灵丹妙药或秘密药方。
一个谜或深奥的秘密。；一种灵丹妙药或秘密药方。；秘密；奥秘；秘方；[医] 秘方药
In use
The archaeologist believed the symbol was an arcanum that could reveal the tomb's location.
Few outsiders have ever learned the arcana of the island's boat-building tradition.
The old cook guarded the arcanum of her family's noodle soup as if it were gold.
the arcanum of [n]
表示某领域的秘密或核心知识。
He spent years seeking the arcanum of transmutation.
他花了多年时间寻找嬗变的奥秘。
an arcanum
泛指一个秘密，常用于正式或学术语境。
The manuscript revealed an arcanum long thought lost.
手稿揭示了一个被认为早已失传的秘密。
the arcanum that [clause]
The arcanum that the alchemist possessed was never written down.
炼金术士掌握的那个奥秘从未被记录下来。
Common mistakes
The alchemist revealed the arcanums of transmutation.The alchemist revealed the arcana of transmutation.
arcanum的复数形式是arcana，而不是arcanums。学习者常受规则复数加-s影响而误用。
He is searching for arcanum about eternal life.He is searching for an arcanum about eternal life.
arcanum是可数名词单数，前需加不定冠词a/an。中文中‘奥秘’常作不可数概念，导致冠词遗漏。
Connections
Learner notes
Learn the forms together
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.