noun (plural ostinatos or ostinati ˌɒstɪˈnɑːti)
A continually repeated musical phrase or rhythm: [as modifier]: the cellos have the tune, above an ostinato bass figure
Italian, literally 'obstinate'.
I was going to be obstinate
about it, finding another word, but then I read the definition. My strong opinion is that there is vastly too much use of repeated phrases in modern US music. It's as if there is no verse to sing, only a seemingly endless ostinato
of the chorus. "We are young, gonna set the world on fire" (Janelle Monáe) will, with luck, not be played 12 times on our local "most variety" music station during the daylight hours.
Words are a game. Sometimes I play alone, but you are welcome to play, too.