You can think of beleaguered as a place with a ring around it. An army has set up camp on every side and simply stays there. The walls have not fallen and the people inside are still alive, but nothing moves in or out easily, and there is no direction to walk away in. The word keeps that ring wherever it goes: whatever is beleaguered is still standing, still being pressed, and still surrounded.
beleaguered 的核心畫面可以想成一個被圍成一圈的地方。軍隊在四面紮營，然後就待著不走。城牆還沒倒，裡面的人也還在，但東西進不來、人出不去，往哪個方向都沒有路。這個字走到哪裡都帶著那個圈：被 beleaguered 的東西通常還撐著，卻同時被壓著、被圍著。
From the word’s history
The packet's Wiktionary etymology gives only the surface build: beleaguer + -ed. So the adjective is simply 'having been beleaguered', which keeps the ring of the verb inside it.
本次提供的維基詞典字源只給到表層結構：beleaguer + -ed。也就是說，這個形容詞就是「被 beleaguer 過的」，動詞裡那個「圍住」的圈就原封不動留在字裡。
Wiktionary, "beleaguered"
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