Quadrature
Meaning: the arrangement of two celestial bodies at right angles as viewed from the Earth
Sentence: The half-moon is in quadrature to the sun.
Quarter
Meaning: each of four equal parts into which a thing is or can be divided
Sentence: A quarter of a hundred is twenty-five.
Quadrilateral
Meaning: a flat geometric shape with four sides
Sentence: A square is a quadrilateral.
Quench
Meaning: to satisfy your thirst by drinking
Sentence: He drank some juice to quench his thirst.
Qualify
Meaning: to become able to do something through training, or by passing a test
Sentence: In order to qualify for a driving licence you must pass your driving test.
Quantity
Meaning: how much there is of something
Sentence: I was overwhelmed by the sheer quantity of information available.
Quest
Meaning: a long search for something
Sentence: His quest to find the treasure was unsuccessful.
Quarantine
Meaning: keeping a person or animal isolated in case they have a disease which could spread to others
Sentence: The dog was kept in quarantine for six months.
Question
Meaning: a sentence asking something
Sentence: Raise your hand if you want to ask a question.
Quarrel
Meaning: to have an angry argument or disagreement
Sentence: I was surprised to see the two friends quarrel with each other.
Questionable
Meaning: causing doubt; not certainly true or honest or advisable
Sentence: He refused to sign the questionable contract.
Questionnaire
Meaning: a form used to collect information about a particular subject
Sentence: Could you please fill in the questionnaire?
Quarrying
Meaning: excavation of rock used for various purposes Quarrying over the centuries may have contributed towards global warming.
Queue
Meaning: a line of people or vehicles waiting for something There was a long queue of people outside the cinema hall.
Quote
Meaning: repeat words that were first written or spoken by someone else
Sentence: She decided to quote Shakespeare in her speech.
Quotient
Meaning: the result of dividing one number by another
Sentence: When six is divided by three, the quotient is two.
Quell
Meaning: to stop something, especially by using force
Sentence: A stampede at a soccer stadium in Indonesia killed at least 125 people and injured more than 320 on Saturday night after police sought to quell violence on the pitch, in one of the world`s worst stadium disasters.
Synonyms: put an end to, stamp out, put a stop to, end, finish, get rid of, crush, put down, check, crack down on, curb, nip in the bud, thwart, frustrate
Antonyms: bring about, prompt
QUALITATIVE
Meaning: relating to, measuring, or measured by the quality of something rather than its quantity.
QUERULOUS
Meaning: complaining in a rather petulant or whining manner.
QUIXOTIC
Meaning: extremely idealistic; unrealistic and impractical.