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1. reward: vt. give sth in return for good and valuable doings. eg. The father rewarded the little boy for cleaning his room. Finally, his hard work was rewarded . reward: n. [C, U] sth as a return for good and valuable doings. eg. The bank developed a new system of rewards to encourage the clerks to work harder. This game had its excitement, challenges, and rewards. rewarding: adj. satisfying and worthwhile She found the experience very rewarding. Teaching is a rewarding career. 2. frustrate: vt. 1) Cause someone to have feelings of disappointment eg. She was frustrated by her failure in the college entrance exam. Cause the failure of sth eg. His attitude frustrated our plan. Thick fog frustrated their attempt to land on the tiny island. frustrating: adj. Making someone feel annoyed, upset, or impatient eg. It’s frustrating when you’re in a hurry and the traffic isn’t moving. Many of the things that my father finds frustrating are exactly what my mother finds most rewarding. 3. be worth sth / doing sth eg. The beautiful town and lovely beaches were well worth the 45-minute drive from our cottage. He’s decided to have a look at the house for it is well worth buying. 4. junior: adj. having a low position, level, or rank eg. She started as a junior reporter on a local newspaper. His job is to give instructions to people junior to him. 5. senior: adj. having a higher position, level or rank eg. They have got effective support from the senior management of the college. His position is senior to me. 6. while: conj. Eg. While I like him personally, I don’t think what he’s doing is right. While professors are talking about economic theories, company chairmen are concerned with profits. 7. former: adj. of an earlier period; n. the first of the two. eg. The coal industry is now hardly half its former size. Of the two possibilities, the former seems more likely. 8. not only … but also…: when you put “not only” at the beginning of a s