21. entomology [en-, in, 안에 + tom-, to cut + (o)logy, 학문] : "몸 안이 마디로 된 것(곤충)을 다루는 학문"  즉,  곤충학(昆蟲學)

22. entomologist :곤충학자

23. intersect [inter-, each other, mutually + sect, to cut] : 교차하다 
intersection :교차로/교차점

• The corners are joined by criss-crossed shortcuts that intersect in the center of the board. There is a space at the intersection and two spaces along each arm of the cross between the central space and the corners. One of the corners will have some indication that it is the "home'' base. The sticks are tossed into the air so that they land on the mat. If a stick goes completely off the mat, the toss is invalid. The count is the number of flat sides facing up, unless all four sticks land rounded-side-up, in which case the count is five. Instead of the usual names of the numbers, Koreans use some ancient words for animals: to (pig) for one, kae (dog) for two, kol (sheep) for three, yut (ox) for four, and mo (horse) for five. If the count is yut or mo, you take an extra throw immediately, before moving a token./ 윷놀이에 대한 설명임.
  윷놀이에 대해서는 여기를 클릭하세요.

24. vasectomy [vase, vessel, (정)관 + sectomy : 절제수술] : 정관(절제)수술

25. separate [se-, to cut + parate < part, 조각] 
(adj.) divided from the rest or others; not associated or connected with others; having existence as an entity; distinct; individual / 분리된, 독립된 

• The prosecution plans today to officially wrap up the two separate investigations, one into a former senior prosecutor's alleged instigation of a labor strike at a public corporation and the other into a lobbying scandal involving the incumbent Kyonggi governor and Inchon mayor.

• A senior NCNP(National Congress for New Politics) official said the party would take its own steps separately from Chong Wa Dae to tighten surveillance on its former members working at state-run  organizations to prevent corruption cases involving them.

(v) to set or put apart into sections, etc.; divide; disunite; sever

• Tracy watched herself being led through the airport, manacled to one of the policemen, while passerby turned to stare. She was shoved into the back of a black-and-white squad car with steel mesh separating the front seat from the rear. The police car sped away from the curb with red lights flashing and sirens screaming.
  [If Tomorrow Comes written by Sidney Sheldon]

26. separation : 분리, 독립

• To raise the probability of success of Daewoo's restructuring plan, the group will accelerate separation of affiliates from the parent group and asset sales.

이 단어의 어원을 알면 “separate, separation”을 “seperate, seperation”으로 잘못 쓰지는 않겠죠 ?

27. sever : to cut /자르다

• Some foreign businesses are even threatening to sever business relations with Korean companies if they fail to guard against the Y2K problem.

28. severance pay : money paid by a company to one of their workers losing his or her job through no fault of his or her own/ 퇴직수당

• Retired executives will have their retirement and severance money confiscated if they were found to have been involved in illegal financial deals that led to the worsening of their financial companies.

29. severe [se-, apart + ver, faith, pledge : 딱 잘라서 단호히] : strict, stern, serious

• Famine-stricken North Korea appears to have suffered severe damage from the torrential downpours(열대성 폭우) and Typhoon Olga, which caused devastating floods and landslides(산사태) in South Korea. 

30. severity : the quality or condition of being severe

• There has been no serious social chaos or revolt in North Korea despite the severity of the food crisis.

• The opening of North Korea's formerly sealed airspace underlined the severity of economic woes confronting the North where some analysts estimate up to three million people have died from famine over the last three years. The communist hermit state had previously banned all overflights by foreign aircraft completely.

First uploaded : June 30, 1999 / Last updated : February 21, 2002