mobile a. movable or not fixed; moving or walking around freely | 
moccasin n. soft leather shoe; originally worn by Native Americans | 
monsoon n. the season of heavy rain during the summer in hot Asian countries | 
mosquito n. two-winged insect whose female has a long proboscis to pierce the skin and suck the blood of humans | 
motivate v. stimulate; provide with an incentive; move to action | 
motive n. emotion or desire; a reason for doing something | 
motorist n. someone who drives, or travels in, an automobile | 
multiple a. having or involving several parts, elements, or members n. a number that can be divided by another number without a remainder | 
murmur v. make low, confused, and indistinct sound, like that of running water | 
musician n. artist who composes or conducts music as a profession | 
nonchalant a. behaving in a calm manner, often in a way that suggests you are not interested or do not care | 
nonfiction n. writing that is about real events and facts | 
nonstop n. a flight made without intermediate stops between source and destination | 
nonviolent a. not involving fighting or the use of physical force | 
novelist n. one who writes novels | 
nuclear a. being or using the power produced when the nucleus of an atom is divided or joined to another | 
official a. relating to an authority or public body and its duties, actions, and responsibilities | 
operate v. be in action or have an effect v. cut a body open to fix an unhealthy or damaged part | 
opinion n. notion founded on probable evidence; belief stronger than impression; favorable estimation | 
opossum n. a small American marsupial that lives in trees and has thick fur, a long nose, and a tail without fur | 
oral a. spoken and unwritten; relating to the mouth | 
orangutan n. a large ape with reddish-brown hair and long arms | 
organize v. make arrangements for something to happen according to a particular system | 
parachute n. rescue equipment made of a large piece of cloth that is fastened to a person who is dropped from an aircraft, in order to make him fall slowly | 
paradise n. garden of Eden; any place of complete delight and peace | 
parallel a. side by side and having the same distance continuously between them n. a person or thing that is similar to another | 
paralysis n. loss of the ability to move a body part | 
participate v. take part in an event or activity | 
pavilion n. a large building in which sports or entertainments take place | 
pedestrian n. a person who is walking, especially in an area where vehicles go a. lacking wit or imagination; not interesting | 
pediatrician n. physician or expert in children's diseases | 
pendant n. ornament, hanging from a necklace; a piece of jewellery worn around the neck | 
pendulum n. a body suspended from fixed point as to swing freely to and fro by the alternate action of gravity and momentum | 
penguin n. short-legged flightless birds of cold southern Antarctic regions | 
penicillin n. a type of antibiotic, used in the treatment of various infections and diseases | 
penitentiary n. state or federal prison for convicted felons | 
perfume n. pleasing, agreeable scent or odor | 
permit v. consent to; give permission | 
perpendicular a. vertical or upright; intersecting at or forming right angles; extremely steep | 
pharmacist n. a health professional trained in the art of preparing and dispensing drugs | 
physician n. a person qualified to practice medicine; a medical doctor but not a surgeon | 
picturesque a. attractive in appearance, especially in an old-fashioned way; scenic | 
popular a. of common people; suitable to common people; easy to be comprehended | 
possession n. act of having and controlling property; belongings | 
precipitation n. water that falls from the clouds towards the ground, especially as rain or snow n. the quantity of water falling to earth | 
predecessor n. former occupant of post; ancestor or forefather | 
prediction n. something foretold or predicted; prophecy | 
preoccupation n. an idea that someone thinks about most of the time  n. state of being worried about or thinking about something most of the time | 
preserve v. uphold or retain; maintain in safety from injury, peril, or harm | 
pretzel n. a hard salty biscuit that has been baked in a stick or knot shape |