require

[ri-kwahyuh r] /rɪˈkwaɪər/
verb (used with object), required, requiring.
1.
to have need of; need:
He requires medical care.
2.
to call on authoritatively; order or enjoin to do something:
to require an agent to account for money spent.
3.
to ask for authoritatively or imperatively; demand.
4.
to impose need or occasion for; make necessary or indispensable:
The work required infinite patience.
5.
to call for or exact as obligatory; ordain:
The law requires annual income-tax returns.
6.
to place under an obligation or necessity:
The situation requires me to take immediate action.
7.
Chiefly British. to desire; wish to have:
Will you require tea at four o'clock?
verb (used without object), required, requiring.
8.
to demand; impose obligation:
to do as the law requires.
Origin
1300-50; Middle English requiren < Latin requīrere, equivalent to re- re- + -quīrere, combining form of quaerere to seek, search for (cf. quest)
Related forms
requirable, adjective
requirer, noun
nonrequirable, adjective
prerequire, verb (used with object), prerequired, prerequiring.
quasi-required, adjective
unrequired, adjective
Synonyms
1. See lack. 3. See demand. 6. obligate, necessitate.
Antonyms
3. forgo.
Examples from the web for require
  • Such an act doesn't require a toga, but it does demand a bit of dignity.
  • They require autonomy and trust within the larger society.
  • The rescheduling may or may not require the lender to bear some financial loss.
  • The company says production costs are kept to a minimum because they require less silicon.
  • If they stick, the findings could set the stage for a less expensive x-ray machine that does not require electricity.
  • If you or yours is a science geek, expressing how much you care doesn't necessarily require actual words.
  • Choose plants while they're in bloom if you require a particular shade of blue.
  • We've all done it, and it got him thinking about why the law would require us to stop when it isn't strictly necessary.
  • In many cases, clinical accreditation and state law require such checks.
  • Successful markets require independent and even combative standard-setters.
British Dictionary definitions for require

require

/rɪˈkwaɪə/
verb (mainly transitive; may take a clause as object or an infinitive)
1.
to have need of; depend upon; want
2.
to impose as a necessity; make necessary: this work requires precision
3.
(also intransitive) to make formal request (for); insist upon or demand, esp as an obligation
4.
to call upon or oblige (a person) authoritatively; order or command: to require someone to account for his actions
Derived Forms
requirable, adjective
requirer, noun
Usage note
The use of require to as in I require to see the manager or you require to complete a special form is thought by many people to be incorrect: I need to see the manager; you are required to complete a special form
Word Origin
C14: from Old French requerre, from Vulgar Latin requaerere (unattested) to seek after, from Latin requīrere to seek to know, but also influenced by quaerere to seek
Word Origin and History for require
v.

late 14c., "to ask a question, inquire," from Old French requerre "seek, procure; beg, ask, petition; demand," from Vulgar Latin *requaerere, from Latin requirere "seek to know, ask," from re-, here perhaps meaning "repeatedly" (see re-), + quaerere "ask, seek" (see query (v.)).

The original sense of this word has been taken over by request (v.). Sense of "demand (someone) to do (something)" is from 1751, via the notion of "to ask for imperatively, or as a right" (late 14c.). Related: Required; requiring.