unyielding

a.不易弯曲的，坚挺的；不屈从的，坚定的，顽强的

unwholesome, unwieldiness, unwieldy, unwilling, unwillingly, unwillingness, unwind, unwise, unwisely, unwitting, unwittingly, unwonted, unworkable, unworldliness, unworldly, unworthily, unworthiness, unworthy, unwound, unwritten, up, up and doing, up and down, up in arms, up to, up to date, up to time, up-, up-and-coming, up-country, up-end, up-market, up-to-date, up-to-the-minute, upbeat, upbraid, upbringing, upcreep, update, updating,