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Lasting a whole week. It goes in front of a noun, not after a verb: a weeklong holiday, a weeklong strike, a weeklong festival, weeklong talks. You would not say "the strike was weeklong" — for that you say "the strike lasted a week".
Lasting a whole week意思是持續一整個星期. It goes in front of a noun它放在名詞前面, not after a verb不放在動詞後面: a weeklong holiday, a weeklong strike, a weeklong festival, weeklong talksa weeklong holiday（為期一週的假期）、a weeklong strike（為期一週的罷工）、a weeklong festival（為期一週的節慶）、weeklong talks（為期一週的會談）. You would not say你不會說 "the strike was weeklong""the strike was weeklong" — for that you say這種情況要說 "the strike lasted a week""the strike lasted a week"（這場罷工持續了一週）.
It belongs to a small family built the same way: daylong, monthlong, yearlong, hourlong, lifelong. American writing usually joins it up (weeklong); British writing often it (week-long), and both are correct.
It belongs to a small family built the same way它屬於一小組用同樣方式組成的字: daylong, monthlong, yearlong, hourlong, lifelongdaylong（一整天的）、monthlong（一整個月的）、yearlong（一整年的）、hourlong（一小時的）、lifelong（終生的）. American writing usually joins it up美式寫作通常連在一起寫 (weeklong)(weeklong); British writing often hyphenates it英式寫作常常加連字號 (week-long)(week-long), and both are correct兩種都對.
The word does real work in news writing, where "a weeklong search" is shorter and tidier than "a search that went on for a week". Note it means the event filled the week, not that it happened once a week — that is "weekly", a completely different word.
The word does real work in news writing這個字在新聞寫作裡真的很好用, where "a weeklong search""a weeklong search"（為期一週的搜索） is shorter and tidier than就比更短、更俐落 "a search that went on for a week""a search that went on for a week"（持續了一週的搜索）. Note it means要注意它的意思是 the event filled the week這件事填滿了整週, not that it happened once a week而不是每週發生一次 — that is "weekly"每週一次是"weekly", a completely different word完全不同的字.
組成week + -long. The -long ending means "lasting for that whole stretch of time", and it attaches straight onto a time word. week traces back through Old English wice to a Proto-Indo-European root *weyk- (to turn or change) — a week is a turn of the cycle; long traces through Old English lang from *dlongʰos.
原始詞典資料1 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。
weeklongadj
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Lasting for (approximately) one week.
- One of those daughters, Jordyn Wilson Peppin, runs the Purely Woman School of Grace, a weeklong program where “ladies” can learn a godly path to “etiquette, grace and hosting.”
- They felt confident that the weeklong artillery bombardment of the German lines had weakened the enemy and that they would encounter little resistance once the "big push" began.
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。