You can think of an odyssey as a road that should have been short and turned out to be ten years long. Someone sets out meaning to get home, and the way keeps bending: storms, wrong turns, people met and lost. The distance is not the point. The point is that by the end the has been rebuilt by the road, and the whole thing has become a story worth telling.
From the word’s history
Wiktionary derives odyssey from the Odyssey, from Ancient Greek Ὀδυσσεία, the story of Odysseus, who spent ten years getting home after the fall of Troy. The common noun keeps the shape of that plot: a journey that should have ended and did not.
Wiktionary 記載 odyssey 來自 Odyssey，而 Odyssey 來自古希臘文 Ὀδυσσεία，意思是「奧德修斯的故事」。詩裡的主角在特洛伊城破之後，花了十年才回到家。這個普通名詞完整保留了那個故事的形狀：一趟早就該結束、卻一直沒結束的旅程。所以用這個字的時候，講的其實不只是「走了很久」，而是「一路被耽擱、被改變」。
Wiktionary, "odyssey"
登入就可以看每一支怎麼連回核心畫面。