| A | B |
| system | a group of related parts that work together as a whole for a particular purpose |
| character | a letter, mark, or sign used in writing, printing, or on a computer |
| forming | to make something by combining two or more parts |
| meaningful | having a meaning that is easy to understand and makes sense |
| borrow | to take or copy someone's ideas, words etc and use them in your own work, language etc |
| specialist | someone who knows a lot about a particular subject, or is very skilled at it |
| referred to | if a statement, number, report etc refers to someone or something, it is about that person or thing |
| divided | separated |
| brain | the organ inside your head that controls how you think, feel, and move |
| bilingual | able to speak two languages |
| past | the time that existed before the present |
| rate | the speed at which something happens over a period of time |
| estimate | judge; calculate |
| linguist | a person who studies languages |
| linguistics | the study of language in general and of particular languages, their structure, grammar, and history |
| reference | part of something you say or write in which you mention a person or thing |
| pick (someone) up | go somewhere to get someone |
| stand for | be a symbol for; mean |
| see someone off | go with someone to the place from which s/he is going to leave |
| clean up | make clean and orderly |
| help out | help someone to do something |