throw – бросать, кидать

throw (v.) (бросать, продвигать); из староанглийского «þrawan» - вертеться, крутиться; из протогерманского *threw-; из PIE *tere- (1) – тереть, тереть вращением, бурить
"to project, propel," c. 1300, from Old English þrawan "to twist, turn, writhe, curl," (past tense þreow, past participle þrawen), from Proto-Germanic *threw- (source also of Old Saxon thraian, Middle Dutch dræyen, Dutch draaien, Old High German draen, German drehen "to turn, twist;" not found in Scandinavian or Gothic), from PIE *tere- (1) "to rub, turn, rub by turning, bore" (source also of Sanskrit turah "wounded, hurt," Greek teirein "to rub, rub away," Latin terere "to rub, thresh, grind, wear away," Old Church Slavonic tiro "to rub," Lithuanian trinu "to rub," Old Irish tarathar "borer," Welsh taraw "to strike").

1675:
To THROW (ðravan, Sax.) – метать, швырять, вертеться¸как подруливающие; работать на оловянной шахте; (1826) – G. “tyrwa”; Isl. “turfa”; S. “torfian, thrawan”

Отрою – ТРЮ – T (H) RW (F); верчение и кручение – это производные