Why vs Hi - What's the difference?

why | hi |

As an adverb 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".

As a verb hi is

to call.



(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)





    Alternative forms

    * (l)


    (wikipedia hi) (en interjection)
  • A friendly, informal, casual greeting said when meeting someone.
  • An exclamation to call attention.
  • * , chapter=7
  • , title= Mr. Pratt's Patients , passage=I made a speaking trumpet of my hands and commenced to whoop “Ahoy!” and “Hello!” at the top of my lungs. […] The Colonel woke up, and, after asking what in brimstone was the matter, opened his mouth and roared “Hi! ” and “Hello!” like the bull of Bashan.}}


    * (friendly informal greeting) hello


  • , often hyphenated.
  • Get hi- quality videos here!
    Next, set the burner to ''hi .

    Derived terms

    * hi-tech * hi-lo * hi-five


    hi (no attested plural)
  • "Hi" or similar greeting.
  • Synonyms

    * greeting, hello


    * English two-letter words ----