upheaval

n.1.胀起,(地壳)的隆起;2.剧变,动乱

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, upgrade, uphill, uphold, upholder, upholster, upholsterer, upholstery, UPI, upkeep, upland, uplift, upon, upper, upper case, upper-cut, uppermost, uppish, upraise, upright, upright piano (also upright), uprightness,