Simple past tense and past participle of trow.(verb)
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Use "trowed" in a sentence
"Then he answering againe said: none of them durst be so bolde he trowed to cary her letters being in that case."
"Must rememer to git new whiskybroom, sumbody trowed away the broom a few daze ago and dranx alla whiskey."
"And now Birdalone told herself that the knight was frank and friendly; yet forsooth she wotted that her heart scarce trowed what it feigned, and that she yet feared him."