ultra-

pref 前缀 (used fairly freely with adjs 可用作较多形容词的前缀) 1 extremely; to excess 极端; 过分: ultra-conservative * ultra-fashionable. 2 beyond a specified limit, extent, etc 超过某一限度、 范围等: ultraviolet * ultra-high. Cf 参看 infra-.

ugli, ugliest, ugliness, ugly, ugly-looking, UHF, UHT, UK, ukulele, ulcer, ulcerate, ulceration, ulcerous, ulna, ulterior, ultimate, ultimately, ultimatum, ultimo, ultra violet, ultramarine, ultrasonic, ultrasound, ultraviolet, ululate, ululation, Ulyanovsk, umber, umbilical, umbilical cord, umbilicus, umbra, umbrage, umbrella, umlaut, umpire, umpteen, umpteenth, un, un-,