Group (E F) - Spelling Practices

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(1) n. (echo) sound reflected from an opposing surface and repeated to the ear; repetition of a sound
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(2) n. (Kinh tế) branch of social science that deals with the production and distribution and consumption of goods and services and their management 
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(3) a. (già) somewhat old; advanced beyond middle age
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(4) n. (điện tử) branch of physics that deals with the behavior of electrons; electronic devices
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(5) a. Syn. entitled; qualified; suitable(đủ điều kiện) qualified; desirable and worthy of choice, especially for marriage
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(6) a. (nhiệt tình) having or showing great excitement and interest
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(7) n. Syn. admission; entrance(nhập cảnh) admission; entrance; item inserted in a written record
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(8) n. (tập) a brief section of a literary or dramatic work that forms part of a connected series
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(9) a. Syn. necessary; critical; vital; indispensable; fundamental(cần thiết) necessary; critical; vital; constituting or being part of the essence of something
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(10) v. Syn. stimulate(hoạt động lại) cause to feel happily refreshed and energetic; fill with emotion