Picture a round platform that turns on one spot. You step on, the music starts, and the same trees, the same faces, the same stall come past you again and again. You are moving the whole time, and you end exactly where you began. Getting off is not really your decision either: you wait for it to slow down. Every use of this word keeps some part of that picture, and which part is kept is what tells the uses apart.
From the word’s history
Wiktionary gives the word as merry (adjective) plus go round (verb) - literally a happy going-round, which is the platform itself.
來源把這個字拆成 merry（開心的）加 go round（繞圈轉），字面上就是「開心地繞圈」。這正好就是那塊會轉的圓台本身。
Wiktionary entry for merry-go-round, etymology: "From merry (adjective) + go round (verb)." (packet source_ref kaikki:3f6f69a190036ae4:536056172:24849)
登入就可以看每一支怎麼連回核心畫面。