Thievery is stealing — the activity of taking things that belong to other people. It is an uncountable noun: you say 'thievery is a problem here', never 'a thievery' or 'three thieveries'. For a single event you switch words: 'a theft'.

ThieveryThievery is stealing就是偷竊 the activity of taking things that belong to other people拿走屬於別人東西的這種行為 It is an uncountable noun它是不可數名詞 you say你會說 'thievery is a problem here'「thievery is a problem here」 never 'a thievery' or 'three thieveries'絕不會說「a thievery」或「three thieveries」 For a single event要講單一一次的事件 you switch words你要換一個字 'a theft'「a theft」

What separates it from 'theft' and 'stealing' is tone. 'Theft' is the legal, police-report word (car theft, theft of a phone). 'Stealing' is the plain everyday word.

What separates it from 'theft' and 'stealing'讓它跟「theft」和「stealing」不一樣的 is tone是語氣 'Theft'「theft」 is the legal, police-report word是法律、警察報案用的字 (car theft, theft of a phone)（car theft、theft of a phone） 'Stealing'「stealing」 is the plain everyday word是平常、日常用的字

'Thievery' is old-fashioned and a bit grand, and modern speakers usually reach for it when they want that flavour — in historical writing, or, very often, half-jokingly: 'the great biscuit thievery of last Tuesday'. Journalists and politicians also use it for scorn, to make ordinary corruption sound like something out of a story: 'years of thievery by the ruling family'.

'Thievery'「thievery」 is old-fashioned and a bit grand老派又帶點誇張 and modern speakers usually reach for it when they want that flavour現代人通常是想要那種味道時才會用 in historical writing像是歷史寫作 or, very often, half-jokingly或者很常是半開玩笑地說 'the great biscuit thievery of last Tuesday'「the great biscuit thievery of last Tuesday」 Journalists and politicians also use it for scorn記者和政治人物也會用它來表達輕蔑 to make ordinary corruption sound like something out of a story讓普通的貪腐聽起來像故事情節 'years of thievery by the ruling family'「years of thievery by the ruling family」

So the meaning is easy and the register is the real lesson. If you want to be understood plainly, say 'stealing'. If you write 'thievery' in a serious modern report, a native reader will notice the word before they notice your point — which may be exactly what you want, or exactly what you don't.

So the meaning is easy所以意思很簡單 and the register is the real lesson語域才是真正要學的重點 If you want to be understood plainly如果你想要平白地被聽懂 say 'stealing'就說「stealing」 If you write 'thievery' in a serious modern report如果你在一篇嚴肅的現代報告裡寫「thievery」 a native reader will notice the word before they notice your point母語讀者會先注意到這個字，才注意到你的重點 which may be exactly what you want, or exactly what you don't這可能正是你想要的效果，也可能正是你不想要的