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| random | 
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| /'rændəm/ a. Syn. haphazard; chance (случайных) without definite purpose, plan, or aim; having no specific pattern He used to get super drunk in random places; I don't know where he is now. | 
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| ratio | 
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| /'reɪʃɪoʊ/ n. Syn. rate; proportion (отношения) relation which one quantity or magnitude has to another of the same kind; rate; proportion Men outnumber women here in the ratio of three to one. | 
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| react | 
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| /ri:'ækt/ v. (реагировать) act against or in opposition to; show a response or a reaction They react negatively to everything I say, because they don't trust me. | 
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| recover | 
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| /rɪ'kʌvə(r)/ v. Syn. regain (Восстановление) get or find back; regain a former condition He is very ill and unlikely to recover in this month. | 
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| refine | 
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| /rɪ'faɪn/ v. Syn. purify (Очистить) purify; make more precise; improve They refine many valuable nutrients out of the foods in our modern diet. | 
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| region | 
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| /'ri:dʒən/ n. (область) province; district; tract; neighborhood; the upper air; sky or heavens; inhabitants of a district All in that region was fire and commotion. | 
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| register | 
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| /'rɛdʒɪstə(r)/ v. Syn. record (Регистрация) give outward signs of; express; record in writing; enroll as a student New students will have to register is tomorrow before getting their books. | 
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| reject | 
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| /rɪ'dʒɛkt/ v. Syn. refuse; deny (отказаться) turn down; refuse to accept; dismiss from consideration He would reject the idea of starting a war. | 
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| relax | 
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| /rɪ'læks/ v. Syn. free; loosen; calm (Отдых) make less severe or strict; become less tense Our new colleague should relax if he sees that we are a friendly group. | 
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| release | 
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| /rɪ'li:s/ v. Syn. liberate; freedom (релиз) give off; liberate; grant freedom to; make something available He wanted to release the list with the names of the prisoners before Monday. | 
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| reluctance | 
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| /rɪ'lʌktəns/ n. (нежелание) state of being reluctant; unwillingness; hesitancy in taking some action The main reason for this reluctance is the threat of litigation for defamation. |