sterilize[ˈsterəˌlaɪz]:to kill all the bacteria on or in something and to make it completely clean, for example by heating it to a very high temperature. Equipment is sterilized in a machine called a sterilizer. verb
transition[trænˈzɪʃ(ə)n]:the process of changing from one situation, form, or state to another verb EX:The author gives an interesting description of a society in transition.
towering[ˈtaʊrɪŋ]:mainly journalism extremely impressive, important, or successful adjective EX:Picasso is a towering figure in the history of 20th-century art.
sector[ˈsektər]:economics a part of a country's economic or business activity noun EX:They tend to work as managers, especially in the small business sector.
sanitary[ˋsænə͵tɛrɪ]:relating to people’s health, especially to the system of supplying water and dealing with human waste adjective EX:Overcrowding has now been added to poor sanitary conditions.
precocious[prɪˈkəʊʃəs]:a precocious child is more intelligent or behaves in a more developed way than you would expect for their age adjective Ex:He was a precocious child─he could read and write at the age of three.