accumulate v. pile up; collect;  mount up; increase | 
adapt v. make fit for; change to suit a new purpose | 
adequate a. sufficient; enough to meet a purpose | 
adjacent a. adjoining; neighboring; close to; lying near | 
analyze v. discover or reveal something through detailed examination; diagnose; examine | 
anticipate v. act in advance of; deal with ahead of time; predict | 
appropriate v. acquire; take possession of for one's own use; set apart for specific use | 
artifact n. object made by human beings; inaccurate observation, effect, or result | 
benefit n. advantage; something that aids or promotes well-being ; welfare; gain | 
calculate v. compute; determine; estimate | 
catastrophe n. calamity; disaster; state of extreme ruin and misfortune | 
chronological a. arranged in order of time of occurrence | 
citizen n. a native or naturalized member of a state | 
civilization n. culture, the stage of human social development | 
compose v. write or create by putting together parts or elements | 
conclusion n. the last section of a communication | 
congruent a. possessing congruity; suitable; agreeing; corresponding | 
consequence n. result; relation of a result to its cause; logical conclusion or inference | 
construct v. form by assembling or combining parts; build; create | 
continuous a. continuing in time or space without interruption; extending without break or irregularity | 
contrast n. act of distinguishing by comparing differences | 
contribute v. provide; bestow a quality on | 
declare v. state clearly;  make known formally or officially | 
democracy n. a political system in which the supreme power lies in a body of citizens who can elect people to represent them  | 
dimension n. measure of spatial extent, especially width, height, or length; size; aspect; element | 
drastic a. radical; taking effect violently or rapidly | 
elaborate a. marked by complexity and richness of detail; done with care and in minute detail | 
encourage v. activate; stimulate | 
equation n. the act of regarding as equal | 
evaluate v. judge or calculate the quality, importance, amount, or value of something | 
exaggerate v. represent as greater than is actually the case; do something to an excessive degree | 
exhaust n. gases ejected from an engine as waste products ; use up the whole supply of | 
expression n. the style of expressing yourself | 
extend v. add to something in order to make it bigger or longer | 
extensive a. widespread; far-reaching; wide | 
factor n. number, except 1, by which a large number can be divided exactly | 
ferocious a. fierce; savage; wild; indicating cruelty | 
frequency n. the number of occurrences within a given time period | 
frequent v. do one's shopping at; do business with; be a customer or client of | 
genuine a. authentic; sincerely and honestly felt or experienced; real or true | 
government n. the governing body of a nation, state, or community | 
history n. past events | 
hypothesis n. assumption; theory | 
irrigate v. supply land with water artificially; clean a wound with a fluid | 
lofty a. high, tall, having great height; idealistic, implying over-optimism | 
manipulate v. operate with one's hands; control or play upon people, forces artfully | 
massive a. enormous; colossal; consisting of great mass; containing a great quantity of matter | 
narrate v. to give an account or tell the story of | 
obedient a. subject in will or act to authority; willing to obey; submissive to restraint, control, or command | 
oblivious a. inattentive or unmindful; lacking all memory; forgetful | 
origin n. the first existence or beginning of anything | 
peculiar a. special; characteristic; unusual; odd; bizarre | 
persuade v. advise; counsel; urge the acceptance or practice of; convince | 
prediction n. something foretold or predicted; prophecy | 
priority n. preceding in time, importance, or urgency | 
quote v. name the price of; state a price for securities, goods, or services | 
realistic a. representing what is real; not abstract or ideal | 
recount v. narrate or tell; count over again | 
reinforce v. give more force or effectiveness to; strengthen; enhance | 
repetition n. act of doing or performing again | 
retrieve v. recover; find and bring in; get back | 
similar a. like or alike; of the same kind | 
solution n. the act of solving a problem, question | 
strategy n. elaborate and systematic plan; plan of action intended to accomplish a specific goal | 
substitute v. exchange; use something or someone instead of another thing or person | 
suspense n. uncertain cognitive state; uncertainty | 
tentative a. hesitant; not fully worked out or developed; experimental; not definite or positive | 
thesis n. paper; dissertation; an unproved statement put forward as a premise in an argument | 
transfer n. shifting; conveyance or removal of something from one place, person, or thing to another | 
unanimous a. uniform; in complete agreement | 
unique a. without an equal; being the only one of its kind | 
variable n. factor; something that is likely to vary; changeable; inconstant | 
viewpoint n. a place from where a person can see something, as natural beauty | 
violate v. treat in a violent manner; abuse; do violence to; disturb; interrupt |