You can think of a seed still sitting in its packet in a drawer. Everything the tree will ever be is already inside it, complete and real. It just has not been put in the ground. `Realize` is the putting-in-the-ground step — making something actual, whether that means building a plan, using an ability, or selling a share for cash. `Un-` says that step has not been taken. So `unrealized` never means 'not there'. It means 'there, but not yet turned into anything you can touch, use or spend'.
From the word’s history
Formed from un- + realized. The realize inside it is the 'make real' sense, not the 'understand' sense, which is why the negative points at an unfinished step rather than at a misunderstanding.
這個字是 un- 加上 realized 組成的。裡面的 realize 是「使成真」那一個，不是「明白」那一個。所以加上 un- 之後，指的是一個還沒完成的步驟，而不是一種誤會。
Wiktionary entry for 'unrealized' supplied in this packet (source_ref kaikki:3f6f69a190036ae4:1558778527), etymology: 'From un- + realized.'
登入就可以看每一支怎麼連回核心畫面。