tuck 夹入，藏入 He ～ed the letter in a book so he wouldn’t lose it

tug (用力)拖或拉He tugged the door but it wouldn’t open

tumble 跌到，滚下The baby is just learning to walk and he’s always tumbling over

tune 曲调，曲子 She wrote the words of the song and her brother wrote the ～

turbulent 骚乱的，动荡的，混乱的，狂暴的a ～ crowd

turn 转动，旋转Turn the hands of the clock until they point to 9 O’clock

tutor 家庭教师，指导教师 When the students are making their choices, their ～ may well guide them

twinkle 闪烁，闪耀，闪亮 The diamond on her finger ～d in the firelight

twist 捻，搓，绞，拧 ～ a rope out of threads

ultimate 最后的，最终的 The war ended for us in ～ victory

unanimous 全体一致的，一致同意的 They are ～ in asking for a rise in pay

uncover 揭开，揭露 ～ a dish of food

underestimate 低估 ～ the difficulties of the task

undergo 经历，遭受，忍受 ～ much suffering

underlie 位于……之下 Many facts ～ my decision

undermine 在……下挖 ～ a wall

undertake 着手做， 从事 ～ an attack

undesirable 不合意的，不受欢迎的 The drug has ～ side effects

uneasy 心神不宁的，不安宁的 be ～uneasy about the future

unfold 展开，打开 ～ a newspaper

uniform 不变的，相同的，均匀，统一的 a ～ temperature

unify 使成一体，统一 become a unified nation

update 更新，使现代化 ～a textbook

upgrade 提高，使升级，改善 ～ products and services

uphold 举起，高举 He upheld his clenched hand

upright 挺直的，垂直的 an ～ seat