東西壓不動
這一組就是那隻手真的壓在東西上的情況，最貼近字面。LDOCE 把這個用法標成 literary，所以它多半出現在小說和描寫性的文字裡。
adjective · C1
Very hard and completely solid, so that it does not bend, move or change shape when you press it, lean on it or walk on it.
堅硬不動的
核心畫面
Think of pressing your hand down on something. It does not sink, it does not bend, it does not move, and it is the same however long you press. Nothing you do changes its shape. Both meanings of the word grow out of that one moment of pushing and getting nothing back: a floor or a piece of ground that will not give, and a person whose position will not give either.
可以想成用手去壓一個東西。它不陷下去，不彎，也不移動。你壓多久，它都一樣。你做什麼都改變不了它的形狀。unyield…更多收起
可以想成用手去壓一個東西。它不陷下去，不彎，也不移動。你壓多久，它都一樣。你做什麼都改變不了它的形狀。unyielding 的兩個意思都從這個「壓下去卻毫無反應」的瞬間長出來：一個是地板或土地不肯讓，一個是人的立場不肯讓。From the word’s history
The packet's Wiktionary entry gives the word as un- + yielding. 'Yield' is to give way, so the word is literally 'not giving way', and both meanings are that same phrase read two ways: a thing that does not give way under weight, and a person who does not give way under pressure.
評估資料裡的 Wiktionary 記的是 un- 加 yielding。yield 本來就是「讓開、屈服」，所以這個字字面上就是「不讓」。兩個意思等於同一句話的兩種讀法：東西被壓不讓，人被施壓也不讓。
Wiktionary etymology supplied in this evidence packet (source_ref kaikki:3f6f69a190036ae4:1138313186), text: 'From un- + yielding.'
Two branches
人的立場推不動
把同一隻手改成壓在別人的想法上：勸、吵、談了很久，對方的立場還是在原地。這裡的「壓力」是別人的意見，不是重量。
adjective · C1
Not willing to change what you think, believe or have decided, even when other people push hard for a change.
不肯讓步的