字面上的空著
最直白的一層：把字拆開來讀，就是「還沒被填」。空間、表格、心裡的缺口都算。
adjective · B2
Not filled: a space, container or gap that is still empty, or a hope or need that nothing has yet met.
沒填滿的
核心畫面
One way to hold this word: a space that has been left open, with the shape of what belongs there still visible. A line ruled on a form, a seat in a row, a box on a shelf. The room is not an accident — something was meant to go in it and has not arrived yet. Put that blank on a staff list and it is a job with no person; put it on an order book and it is goods that have not gone out.
unfilled 可以想成「一個留著、還等著被放東西的空位」。表格上畫好的一行、一排座位裡的那一格、架上空出來的位置…更多收起
unfilled 可以想成「一個留著、還等著被放東西的空位」。表格上畫好的一行、一排座位裡的那一格、架上空出來的位置。重點不是空，而是那個位置本來就該有東西。這個空格放到人事表上，就是職缺還沒招到人。放到訂單簿上，就是貨還沒出去。三個用法看的都是同一格空白，差別只在那張表是什麼表。From the word’s history
From un- plus filled. The prefix un- goes back through Middle English and Old English un- to Proto-Germanic, always meaning not. So the word can be read straight through: not filled.
unfilled 是 un- 加上 filled 造出來的。un- 一路往回追是中古英語 un-、古英語 un-，再到原始日耳曼語 *un-，意思從頭到尾都是「不、沒有」。所以這個字可以整個拆開來讀：沒有被填。職缺和訂單那兩個用法，就是把這個空格畫在不同的表上。
Wiktionary via kaikki snapshot 3f6f69a190036ae4, unfilled etymology 1: From un- + filled; un- from Middle English un-, Old English un-, Proto-Germanic *un-
Two branches
職場與生意上的空格
同一個空格，畫在公司的表上：人事表上缺的是人，訂單簿上缺的是貨。兩個都偏正式，常出現在報告和新聞裡。
adjective · B2
Used about a job, a post or a place on a course that is open but that nobody has taken yet, because no suitable person has been found or has applied.
（職缺）還沒補上的