quir-, quisit-, quis-, que-, quer-, quest-, -quirement, -quirable, -quisition, -quisitive

(Latin: to ask, to seek)

require (verb), requires; required; requiring
1. To be in need of something or someone for a particular purpose: The long trip tomorrow requires a good night's sleep.
2. To have something as a necessary precondition: The men were required to dress formally with jackets and ties for the wedding ceremony.
3. To insist that someone do something: Jim was required to arrive at the medical appointment on time or he would have to wait much longer before the doctor could see him if he got there late.
required (adjective), more required, most required
1. Necessary or appropriate: Most of the required background for Harry's term paper was found on the internet.
2. Insisted upon or imposed as a condition: Max was told that "work experience" was a required qualification a person must have when applying for the engineer's job that he was seeking.
requirement (s) (noun), requirements (pl)
1. Something that is needed for a particular purpose: The passport application had a requirement that a current photograph be provided.
2. Anything that is obligatory or demanded: Basic language skills were requirements for the new job in the translation services.
requisite (s) (noun), requisites (pl)
Something that is necessary or indispensable: Karen always thinks that jam is a requisite for a good peanut butter sandwich.

Having a source of heat is an obvious requisite during cold winter days.

requisite (adjective), more requisite, most requisite
Characteristic of something that is necessary and expected for a special reason: Shirley had the requisite license with all of the qualifications necessary to drive the school bus.
requisition (s) (noun), requisitions (pl)
1. A written or printed statement for anything that is needed: Ted, the captain of the boat, put in a requisition for food, water, and other necessities for his crew to be delivered before the next cruise.
2. The act or process of ordering something to be done: The police officer stipulated a requisition that Carl had to get out of the car and to show his driver's license.
requisition (verb), requisitions; requisitioned; requisitioning
To demand and take something that is needed; especially, for official or military use: Mrs. Swift, the school principal, requisitioned a new computer for her office.
Si monumentum requiris, circumspice. (Latin proverb)
Translation: "If you seek a monument, look around you."

An inscription on Sir Christopher Wren's tomb in St. Paul's Cathedral, London, England. Wren was the architect of the cathedral that was constructed in 1675-1720.

unconquerable (adjective), more unconquerable, most unconquerable
A reference to something which cannot be captured or overcome: The unconquerable floods that have taken place in Great Britain during the winter of 2014 have caused a great loss of property and significant challenges for reconstruction in many parts of the country.
unconquerably (adverb), more unconquerably, most unconquerably
In a manner that cannot be defeated, subdued, or overpowered: Jack's unconquerably good humor could not be surpassed by the sudden snowstorms.
unquestionable (adjective), more unquestionable, most unquestionable
That which is beyond doubt and cannot be legitimately challenged: Harriet's unquestionable integrity was always respected by her peers at the company where she worked.
unquestionably (adverb), more unquestionably, most unquestionably
In a manner that leaves no room for doubt or uncertainty; indisputable: Mr. Deal, the principal of the school, spoke in an unquestionably firm voice when he told the playground bully that he would be permanently expelled from the school unless he behaved himself.