Back in late 2004, around the time she swore against nudity, was when the trouble started.
Salinger hated it, and swore never to cooperate with Hollywood again.
He was the point man in the promotion when Evel Knievel swore he'd soar across Snake River Canyon in a sawed-off rocket ship.
Svanberg swore his company cares about “the small people.”
She had the baby, swore Domenici to secrecy, and lived her life in relative peace as a behind-the-scenes operative—until now.
She treated it as a joke, until he swore he'd never see her again.
He stamped backwards and forwards, and twisted his mustaches, and swore.
I swore that (among other things) one such snubbing was enough.
Gorman and I were there and when he first saw Mrs. Ascher he swore.
But Baboo Dass swore he had seen a beast with his hands on the window.
Old English swerian "take an oath" (class VI strong verb; past tense swor, past participle sworen), from Proto-Germanic *swarjan-, (cf. Old Saxon swerian, Old Norse sverja, Danish sverge, Old Frisian swera, Middle Dutch swaren, Old High German swerien, German schwören, Gothic swaren "to swear"), from PIE root *swer- (1) "to speak, talk, say" (cf. Old Church Slavonic svara "quarrel"). Also related to the second element in answer. The secondary sense of "use bad language" (early 15c.) developed from the notion of "invoke sacred names." Swear-word is American English colloquial from 1883. Swear off "desist as with a vow" is from 1898.