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To unblock something is to take out whatever is stuck inside it, so things can move through again.
To unblock something把某個東西 unblock is to take out就是把裡面卡住的東西拿出來 whatever is stuck inside it, so things can move through again好讓東西可以重新流通。
The everyday use is about , drains, sinks, toilets, noses — anything that is a tube with something caught in it. You unblock a drain with a wire or a chemical; a hot drink can unblock your nose.
The everyday use日常的用法 is about pipes, drains, sinks, toilets, noses是水管、排水孔、水槽、馬桶、鼻子 — anything that is a tube with something caught in it任何裡面卡了東西的管狀物都算。You unblock a drain你可以疏通排水孔 with a wire or a chemical用鐵絲或化學藥劑; a hot drink一杯熱飲 can unblock your nose可以讓你的鼻子通。
Note the shape of the idea: the thing you unblock is the PIPE, not the stuff you pull out. You unblock the sink; you do not unblock the hair.
Note the shape of the idea留意一下這個概念的結構: the thing you unblock你 unblock 的東西 is the PIPE是那條「管子」, not the stuff you pull out不是你拉出來的那些東西。You unblock the sink你是疏通水槽; you do not unblock the hair而不是 unblock 那些頭髮。
Beyond , the word has spread in two directions. Roads and paths get unblocked when police move a crashed car away. And now, very commonly for your students, it is the computer word: if you blocked someone on LINE, Instagram or a game, you can unblock them, and then their messages reach you again.
Beyond pipes除了水管以外, the word這個字 has spread in two directions還延伸出兩個方向。Roads and paths道路 get unblocked會被 unblock（疏通） when police move a crashed car away警察把撞壞的車移開的時候。And now而現在, very commonly for your students對你的學生來說很常見的是, it is the computer word它是電腦用語: if you blocked someone如果你在 on LINE, Instagram or a game在 LINE、Instagram 或某個遊戲裡封鎖了某人, you can unblock them你可以把他們解除封鎖, and then their messages reach you again這樣他們的訊息就能再傳到你這裡。
Same idea underneath — something was in the way, now it is not. It is a plain, ordinary word, not formal at all, and it works as a normal verb: unblock, unblocks, unblocked, unblocking. People also say 'get it unblocked' when someone else does the work for them.
Same idea underneath骨子裡是同一個概念 — something was in the way本來有東西擋著, now it is not現在沒有了。It is a plain, ordinary word是個平常、普通的字, not formal at all一點也不正式, and it works as a normal verb而且是個普通動詞: unblock, unblocks, unblocked, unblocking（unblock, unblocks, unblocked, unblocking）。People也 also say會說 'get it unblocked'「get it unblocked」 when someone else does the work for them當是別人幫忙處理的時候。
組成un- + block. Here un- is the 'undo it' un-, not the 'not' un-: it reverses an action that already happened, the way untie undoes tying and unlock undoes locking. So unblock = undo the blocking. Block itself is the ordinary word for a lump of something solid — a block of wood — and a lump of something solid sitting in a pipe is exactly what stops it.
原始詞典資料5 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。
unblockverb/ʌnˈblɒk/
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To remove or clear a block or obstruction from.
- We need a plumber to unblock the sink.
- During this period, Network Rail was able to unblock a culvert and stabilise a high-risk landslip at Beattock, and to stabilise a high-risk landslip site at Ravenstruther (near Carstairs).
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To free or make available.
- It is not just bad news about Dubai that gets blocked from the Internet; […] a whole range of other social networking sites have been blocked, unblocked and reblocked.
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card-gamesgamesIn whist, to throw away a high card so as not to interrupt one's partner's long suit.
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To enable communication again, via telephone, instant messaging, etc., with (somebody previously blocked).
unblocknoun/ʌnˈblɒk/
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The removal of a block or blockage.
- Look for every opportunity to create an entry to the weak hand. Spectacular unblocks are often needed.
- Control messages, such as requests/forwards/unblocks, are often shorter as they need to carry the address and some header information, while data messages, such as responses, are cache-line sized with some extra header information.
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。