Therefore vs Why - What's the difference?

therefore | why |

As adverbs the difference between therefore and why

is that therefore is (conjunctive) for that or this purpose, referring to something previously stated while why is for what cause, reason, or purpose.

As a noun why is

reason or why can be (uk|dialect) a young heifer.

As an interjection why is

an exclamation used to express indignation, mild surprise, or impatience "well, i'll tell you".

Other Comparisons: What's the difference?




  • (conjunctive) For that or this purpose, referring to something previously stated.
  • *
  • I have married a wife, and therefore I can not come.
  • *
  • Behold, we have forsaken all, and followed thee; what shall we have therefore ?
  • (conjunctive) Consequently, by or in consequence of that or this cause; referring to something previously stated.
  • * , title=(Discourse on the Method)
  • , passage=Je pense, donc je suis (I think, therefore I am)}}
  • *
  • , title=(The Celebrity), chapter=1 , passage=In the old days, to my commonplace and unobserving mind, he gave no evidences of genius whatsoever. He never read me any of his manuscripts, 
  • * {{quote-magazine, year=2012, month=March-April, author=
  • , volume=100, issue=2, page=171, magazine=(American Scientist) , title= Well-connected Brains , passage=Creating a complete map of the human connectome would therefore be a monumental milestone but not the end of the journey to understanding how our brains work.}}
  • * (rfdate), Spectator
  • He blushes; therefore he is guilty.


    * (for that purpose) so, thus, to that end, to this end * (consequently) hence, then, thus, accordingly, as a result, (math)

    Derived terms


    See also




    (wikipedia why)

    Etymology 1

    From (etyl), from (etyl) . See (l).


  • For what cause, reason, or purpose.
  • #
  • Why is the sky blue?
  • Why did you do that?
  • I don’t know why he did that
  • Tell me why the moon changes phase.
  • #
  • Why spend money on something you already get for free?
  • Why not tell him how you feel?
  • #
  • Why''' him? '''Why not someone taller?
  • * {{quote-magazine, date=2013-07-20, volume=408, issue=8845, magazine=(The Economist)
  • , title= Welcome to the plastisphere , passage=Plastics are energy-rich substances, which is why many of them burn so readily. Any organism that could unlock and use that energy would do well in the Anthropocene. Terrestrial bacteria and fungi which can manage this trick are already familiar to experts in the field.}}
    * how come, wherefore


    (en noun)
  • reason
  • A good article will cover the who, the what, the when, the where, the why and the how .
    * wherefore


    (en interjection)
  • An exclamation used to express indignation, mild surprise, or impatience. "Well, I'll tell you...".
  • * Daniel Defoe
  • Why , child, I tell thee if I was thy mother I would not disown thee; don't you see I am as kind to you as if I was your mother?”
    Derived terms
    * whyever * why in God's name * why not * why on Earth * whys and wherefores * why the Devil * why the dickens * why the fuck

    Etymology 2


  • (UK, dialect) A young heifer.
  • (Grose)