merry-go-round
merry + go-round
https://gyazo.com/61756dd4051ef72125cac2f4b945d4d9
source: ［CLOSED］ Merry Go Round Limited Edition - Forums - MyAnimeList.net
noun
a revolving machine with model horses or other animals on which people ride for amusement.
メリーゴーランド, 回転木馬(｟米｠ carousel, carrousel, ｟英｠ roundabout).
a large revolving device in a playground, for children to ride on.
a continuous cycle of activities or events, especially when perceived as having no purpose or producing no result:
〖単数形で〗【活動･出来事などの】めまぐるしい連続, めまぐるしさ «of»
e.g. the football management merry-go-round.