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sine qua non

sine qua non

3 9.9
Something that must exist for something else to work
  • noun
  • /ˌsaɪneɪ kwɑː nɒn/
  • Formal
translation icon : sine qua non
  • Indeed, auteurist trademarks can be said to be the sine qua non of competitions in the international festival circuit.
  • the sine qua non of democracy
  • condition sine qua non

Examples

  • Effective communication is the sine qua non for any healthy relationship.

  • In a world of change, we identify the following as sine qua non sustaining elements.

    Academic text (2000)
  • And if we want to find the right match, we have to understand the sine qua non of that person.

  • All three levels of teachers clearly saw the students as the sine qua non for remaining in teaching.

    Academic text (2010)
  • A teacher's flexibility is the sine qua non of any kind of successful student research project.

    Academic text (1991)
  • Thus, price variability is the sine qua non of an efficient market economy.

    Academic text (1991)
  • Criticism of the various aspects of American social life was a condition sine qua non of publishable writing.

    Academic text (2003)
  • The existence of such frustrations and fears is the sine qua non of talk radio; it would not exist without them.

    Academic text (2011)
  • Elections, open, free, and fair, are the essence of democracy, the inescapable sine qua non.

    Academic text (1997)
  • The participation of Buthelezi and the IFP is the sine qua non of any successful political agreement.

    Academic text (1993)

Synonyms

essential
vssine qua non
50 2.4

Things you need for a purpose, like food or water

is the formal phrase used to name that indispensable element
requisite
vssine qua non
3 6.8

Something needed for a particular activity or purpose

is a general indispensable element not limited to a specific purpose
essential condition
vssine qua non
1 3.5

Something that must be true or happen first for another thing to happen

is a broader name for an indispensable element rather than just a prerequisite

How Essential

sine qua non
  • Formal
3 9.9
vital
403 3.5
essential
50 2.4
necessary
1.0
important
1.0

Surface Forms

sine qua non singular
sine qua nons plural

Morphology

sine + qua + non

This is a fixed Latin loan phrase whose constituents (sine, qua, non) are not productive English words for an average B1 learner, so the meaning cannot be derived from standard English composition patterns. Even though the literal Latin parts can be glossed ('without which not'), the phrase functions as an idiomatic Latinism in English and is not transparently predictable to learners who only know ordinary English vocabulary.

Etymology

Sine qua non comes from Latin words sine 'without', qua 'which', and non 'not'. The phrase literally means 'without which not', a clear picture of something you cannot do without, so it now means 'an essential condition'.