1. Autograph – A signature, especially that of a famous person.
  2. Biography – A detailed description of someone’s life.
  3. Chronology – The arrangement of events or dates in the order of their occurrence.
  4. Democracy – A system of government by the whole population or all the eligible members of a state.
  5. Euphoria – A feeling of intense happiness and excitement.
  6. Geology – The science that deals with the earth’s physical structure and substance.
  7. Hydraulic – Operated by, moved by, or employing water or other liquids.
  8. Isolate – To cause a person or place to be or remain alone or apart from others.
  9. Kinetics – The branch of chemistry or biochemistry concerned with measuring and studying the rates of reactions.
  10. Metamorphosis – A transformation or dramatic change.
  11. Neuroscience – The scientific study of the nervous system.
  12. Optics – The branch of physics that deals with the behavior and properties of light.
  13. Philosophy – The study of the fundamental nature of knowledge, reality, and existence.
  14. Synthesize – To combine a number of things into a coherent whole.
  15. Telegraph – An apparatus for transmitting messages to a distance, using Morse code.
  16. Theology – The study of the nature of God and religious belief.
  17. Telescope – An optical instrument designed to make distant objects appear nearer.
  18. Telephone – A system that converts acoustic vibrations to electrical signals in order to transmit sound.
  19. Thermometer – An instrument for measuring and indicating temperature.
  20. Toxic – Poisonous or harmful.
  1. Abdicate – To renounce one’s throne or position.
  2. Benefactor – A person who gives money or other help to a person or cause.
  3. Convene – To come together or assemble, usually for some public purpose.
  4. Digest – To break down food in the stomach and intestines.
  5. Eloquent – Fluent or persuasive in speaking or writing.
  6. Facilitate – To make an action or process easier.
  7. Fracture – The cracking or breaking of a hard object or material.
  8. Gravity – The force that attracts a body toward the center of the earth.
  9. Illuminate – To light up or make clear.
  10. Incredible – Difficult to believe; extraordinary.
  11. Interrupt – To stop the continuous progress of (an activity or process).
  12. Justice – Just behavior or treatment; the quality of being fair and reasonable.
  13. Legible – Clear enough to read.
  14. Magnify – To make something appear larger than it is.
  15. Mortal – Subject to death.
  16. Naval – Relating to a nation’s navy or military ships.
  17. Permanence – The state or quality of lasting or remaining unchanged indefinitely.
  18. Precede – To come before something in time.
  19. Receptacle – An object or space used to contain something.
  20. Reside – To live in a particular place.
  21. Retrograde – Moving backward; contrary to the usual direction.
  22. Revise – To reconsider and change something.
  23. Sacrifice – To give up something valued for the sake of something else.
  24. Submerge – To cause something to be under water.
  25. Transmit – To send from one place to another.
  26. Vocal – Relating to the voice.
  27. Vortex – A mass of whirling fluid or air.
  28. Versatile – Able to adapt or be adapted to many different functions or activities.
  29. Vivid – Producing powerful feelings or strong, clear images in the mind.
  30. Vocalize – To produce sound with the voice.
  1. Astronomy – The science of celestial objects and space (Greek: astron – star).
  2. Bilingual – Fluent in two languages (Latin: bi – two; lingua – tongue).
  3. Circumference – The distance around a circle (Latin: circum – around; ferre – to carry).
  4. Cognition – The mental action or process of acquiring knowledge (Latin: cognoscere – to know).
  5. Corpuscle – A small cell or particle (Latin: corpus – body).
  6. Dissect – To cut apart for analysis (Latin: dis – apart; secare – to cut).
  7. Equator – The imaginary line dividing the earth into northern and southern hemispheres (Latin: aequus – equal).
  8. Expedition – A journey undertaken for a specific purpose (Latin: ex – out; pes – foot).
  9. Friction – The resistance that one surface or object encounters when moving over another (Latin: fricatus – rubbed).
  10. Germinate – To begin to grow or develop (Latin: germen – sprout).
  11. Inscription – Words inscribed on something (Latin: inscribere – to write on).
  12. Irrigation – The supply of water to land or crops (Latin: irrigare – to water).
  13. Judicial – Relating to the administration of justice (Latin: judicare – to judge).
  14. Linguistics – The scientific study of language (Latin: lingua – language).
  15. Manual – Done by hand (Latin: manus – hand).
  16. Mutation – A change or alteration (Latin: mutare – to change).
  17. Pseudonym – A fictitious name (Greek: pseudes – false; onyma – name).
  18. Quadrant – A quarter of a circle (Latin: quadrans – one-fourth).
  19. Reactor – A device used in nuclear reactions (Latin: agere – to do).
  20. Sculpture – The art of shaping figures or designs in three dimensions (Latin: sculptura – carving).
  21. Spectacle – A visually striking performance or display (Latin: spectare – to look at).
  22. Structure – The arrangement of and relations between the parts of something complex (Latin: structura – building).
  23. Television – The transmission of visual images and sound (Greek: tele – far; Latin: visio – sight).
  24. Unanimous – Fully in agreement (Latin: unus – one; animus – mind).
  25. Vocabulary – The body of words used in a particular language (Latin: vocabulum – word).

let’s practice!