/dɪˈzɒlv/ to put something in water so it becomes liquid Salt dissolves in water. διαλύω

/ˈmuːvmənt/ the action of moving the body or part of it Jenny watched the child's every movement to make sure she was not at risk of getting hurt. κίνηση

/ˈrefrəns/ a note in a book that says where the information comes from There is a list of references at the end of the book. βιβλιογραφική αναφορά,παραπομπή

/rɪˈliːs/ to let something come out of a place Gas was released when we opened the pipe. ελευθερώνω

/ˈsɑːmpl/ a small amount of something that can be used to test what it is like We took a sample of the sea water to see if it was clean enough to swim in. δείγμα

/səbˈmɪt/ to hand in (a document, project, etc.) for consideration We submitted our proposal for the new park play area last week. υποβάλλω

/ˈsʌbstəns/ a kind of liquid, solid or gas matter with certain qualities Glue is a very sticky substance. ουσία

/ˈsɜːveɪ/ a piece of research to investigate the opinions or behaviour patternsof a group of people We carried out a class survey daily eating habits. έρευνα

/ˈθɪəri/ a set of ideas that explain how or why something exists or happens The film was based on the unproven theory thataliens could be living among us on Earth. θεωρία

/ˈɔːltə(r)/ to become slightly different; to change slightly Town planners altered the proposals for the new road after complaints that it would destroy the nature reserve. αλλάζω

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/ˈdaʊnwədz/ in a direction towards the ground Make sure your hands are pointing downwards as you do this exercise. προς τα κάτω

/ˈlɪsnə(r)/

/məʊd/

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/kənˈsjuːm/ to buy or use We consumed a lot of water for the garden plants this summer. καταναλώνω

/trænsˈfɔːm/ to change something into something else Andrea is looking for a way to transform her old laptop into a touch-screen tablet. μεταμορφώνω

/ˈʌltɪmət/ most extreme The contest will be the ultimate test of your computer skills. απόλυτος, -η, -ο, έσχατος, -η, -ο

/ˈvɜːʃn/ a method, way, form of something that is slightly different from an earlier method, way, form. There is a new version of the program available now.

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/ˈbjuːtəf(ə)l/ to have beauty, to be good to look at Thank you so much for the beautiful flowers! όμορφος, -η, -ο

/kənˈdʌkt/ to organise or do a particular activity Scientists are conducting further research into the prevention ofcancer. διεξάγω

/kəʊˌɒpəˈreɪʃn/ the act of doing something together as a group with one aim Good cooperation between parents and teachers helped the school run smoothly. συνεργασία

/kəʊˈɒprətɪv/ helpful by doing what you are asked to do John's manager was more cooperative when she realised his ideacould benefit the company. συνεργάσιμος, -η, -ο

/ˌkjʊəriˈɒsəti/ a strong desire to learn or do something Young children have a strong curiosity to knowabout how everything works. περιέργεια

/dɪˈtɜːmɪn/ to discover facts; to identify the reason behind Scientists cannot determine the causes of many illnesses. καθορίζω

/iˈlektrɪkl/ to use electricity There is an electrical problem due to the storm, so the computer is off-line. ηλεκτρικός, -ή, -ό

/ˈevɪdəns/ proof; facts that show you the truth Catherine has proof that the cat ate the fish. αποδεικτικά στοιχεία

/ˈdʒiːniəs/ a person who is very clever Einstein was believed to have been a genius. ιδιοφυία

/hɑːm/ something that causeshurt to someone or damage to something There's no harm in trying to adopt healthier eating habits. βλάβη, ζημιά, τραυματισμός

/ˈhelpfl/ able to improve a situation His teacher'scomments on his essay were very helpful. βοηθητικός, -ή, -ό

/ˈhəʊpfl/ believing that something will happen I feel hopeful that I'll get a new job soon. αισιόδοξος, -η, -ο, θετικός, -ή, -ό

/ɪˈmædʒɪnətɪv/ having interesting and new ideas The recipe uses herbs in an imaginative way. ευφάνταστος, -η, -ο, ευρηματικός, -ή, -ό, που έχει μεγάλη φαντασία

/ˌɪnəʊˈveɪʃn/ a new creation, idea or way of doing something The internet was a great innovation that has revolutionised international communications. καινοτομία

/ˈɪnəveɪtɪv/ introducing a new way of doing something He won the first prize for the most innovative idea. καινοτόμος, -η, -ο, εφευρετικός, -ή,-ό

/ɪnˈtelɪdʒəns/ the ability to learn, understand and think logically His intelligence has helped him to succeed at work. εξυπνάδα

/ˈleɪbə(r)/ a period of work; a specific task Learning physics can be hard labour for some people. εργασία, μόχθος

/ˈpleʒərəbl/ that gives pleasure or makes somebody happy Attending the concert was a pleasurable experience. απολαυστικός, -ή, -ό

/ˈpleʒə(r)/ the feeling of happiness or enjoyment I read adventure stories for pleasure. απόλαυση

/ˈpræktɪkəl/ connected with real things Dad always gives good practical advice. πρακτικός, -ή, -ό

/rɪˈsɜːtʃə(r)/ a person who studies something carefully to find new information about it Educational researchers are working on developing new teaching methods. ερευνητής

/ˈsəʊʃl/ involving mixing with other people Students can sign up to take part in a number of after-school social activities, such as the drama club. κοινωνικός, -ή, -ό

/səˈsaɪəti/ people who live together in communities Today's society is facing the problems of high unemployment and homelessness. κοινωνία

/trəˈmendəs/ very great My grandmother had a tremendous effect on me as a child. τεράστιος, -α, -ο

/juːz/ the act of using something The use of plastic bags has been limited dramatically in European countries. χρήση

/ˈjuːsfl/ that can help you do something He gave us some very useful information about the old building. χρήσιμος, -η, -ο