problem

[prob-luhm]
noun
1.
any question or matter involving doubt, uncertainty, or difficulty.
2.
a question proposed for solution or discussion.
3.
Mathematics. a statement requiring a solution, usually by means of a mathematical operation or geometric construction.
adjective
4.
difficult to train or guide; unruly: a problem child.
5.
Literature. dealing with choices of action difficult either for an individual or for society at large: a problem play.
Idioms
6.
no problem, (used as a conventional reply to a request or to express confirmation, affirmation, or gratitude).

Origin:
1350–1400; Middle English probleme < Latin problēma < Greek próblēma orig., obstacle, (akin to probállein to throw or lay before), equivalent to pro- pro-2 + -blē-, variant stem of bállein to throw (cf. parabola) + -ma noun suffix of result

subproblem, noun


1, 2. puzzle, riddle, enigma.


1. certitude.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
problem (ˈprɒbləm)
 
n
1.  a.  any thing, matter, person, etc, that is difficult to deal with, solve, or overcome
 b.  (as modifier): a problem child
2.  a puzzle, question, etc, set for solution
3.  maths a statement requiring a solution usually by means of one or more operations or geometric constructions
4.  (modifier) designating a literary work that deals with difficult moral questions: a problem play
 
[C14: from Late Latin problēma, from Greek: something put forward; related to proballein to throw forwards, from pro-² + ballein to throw]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

problem
1382, "a difficult question proposed for solution," from O.Fr. problème (14c.), from L. problema, from Gk. problema "a problem, a question," lit. "thing put forward," from proballein "propose," from pro "forward" + ballein "to throw" (see ballistics). Problem child first recorded 1920.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Idioms & Phrases

problem

see no problem.

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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Example sentences
But perhaps the biggest problem is that schools do not value good teachers over
  bad ones.
Daydreaming can help solve problems, trigger creativity, and inspire great
  works of art and science.
The problem could have been avoided, and it still could be reduced.
Nevertheless, there is still a problem.
Idioms & Phrases
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