perseverate

Does she shrug stuff off, or perseverate at 3 a.m.?

Moreover, this isn't just about finding something better to do than perseverate about an exclusion that won't actually happen.

I don’t mean for you to clear your schedule and perseverate; quite the contrary.

He would break things — “usually a lamp” — and perseverate on what seemed to him a streak of awful luck.

“She tends to perseverate on contact with her family,” Smith said.