To cause irritation by reiteration.
The etymology was a tough one! From the Italian ostinato meaning obstinate, persistent.
“From the way you obganiate about him I can tell you are enamored with this new man of yours but for sanity’s sake there's only so many ways I can respond to the phrase isn’t he dreamy?”
Love Tahlia, who just spent two weeks listening to someone obganiate about how majestic a deer was.