You can think of unrecognized as a face moving through a crowd that nobody picks out. To recognize something is to see it and say what it is; put un- in front and that moment never happens. The thing is fully there, and still no finger points at it. From that one picture the word grows in three directions: no one picks out your face, no one picks out the problem, and no authority picks out your group as real.
From the word’s history
The packet's source entry gives the word as un- + recognized, with un- traced back through Middle and Old English. So this is not a separate word but recognized turned over: every kind of noticing that recognized can carry, unrecognized carries the missing version of.
來源資料把這個字拆成 un- 加 recognized，而 un- 這個否定前綴可以一路追到古英語。所以它不是另外造出來的字，而是把 recognized 整個翻面。recognized 能指的每一種「認」——認臉、注意到、正式認可——unrecognized 就指對應的那種「沒認」。這也解釋了為什麼它的意思看起來分散，其實共用同一個動作。
Wiktionary etymology supplied in this packet: “From un- + recognized.” (source_ref kaikki:3f6f69a190036ae4:1430976239:9490)
登入就可以看每一支怎麼連回核心畫面。