When something is arcane, only a small group of people know it or can follow it. It is not merely “secret,” like a password; it is knowledge that feels shut away because it is specialist, old-fashioned in form, or written so that outsiders cannot get in. Lawyers, programmers, and scholars use it for rules and details you only learn after a long time inside a field — tax law can be arcane, and so can the small print of a game.

When something is arcane當一個東西是arcane的 only a small group of people know it or can follow it表示只有一小群人懂它、跟得上它。It is not merely "secret," like a password它不只是像密碼那樣的『秘密』 it is knowledge that feels shut away而是一種感覺被封起來的知識 because it is specialist, old-fashioned in form, or written so that outsiders cannot get in因為它很專業、形式老派，或寫法就是讓外人進不去。Lawyers, programmers, and scholars use it for rules and details you only learn after a long time inside a field律師、工程師、學者會用這個字，形容要在這行待很久才會懂的規則和細節 — tax law can be arcane, and so can the small print of a game——像稅法可以是arcane，遊戲的細則小字也可以是。

Though actually, people stretch it a lot: they call anything fancy and confusing “arcane,” even when it is only new, not hidden.

Though actually, people stretch it a lot不過其實大家也常常把這個字用得更寬: they call anything fancy and confusing "arcane,"只要是花俏又搞不懂的東西，都叫它『arcane』 even when it is only new, not hidden就算那東西只是新，不是被藏起來。

In stories and games, Arcane often gets used as a name for magic, as if magic were a closed craft. That is a later, looser use. The word itself is rather formal; a student would more often say “only experts understand that.”

In stories and games, Arcane often gets used as a name for magic在故事和遊戲裡，Arcane常常被拿來當作魔法的名字 as if magic were a closed craft好像魔法是一種封閉的技藝。That is a later, looser use這是比較後來、比較鬆散的用法。The word itself is rather formal這個字本身其實蠻正式的 a student would more often say "only experts understand that."學生比較常會說『only experts understand that（只有專家才懂那個）』。