what

what

A child points to a colorful toy and asks, "What is that?"

Definition
  1. Pronoun:

    • Interrogative pronoun: Used to ask for information about something unknown or unspecified.
      • What is your name? (Asking for specific information.)
      • What happened? (Inquiring about an event.)
    • Relative pronoun: Used to refer to something that is specified or understood from context.
      • I know what you mean. (The thing that you mean.)
      • She gave me what I needed. (The thing that I needed.)
  2. Determiner:

    • Asking for identification: Used before a noun to ask for information about a specific thing or person.
      • What book are you reading? (Which book?)
      • What time is it? (Asking for the specific time.)
  3. Adverb:

    • To what extent: Used to express surprise, disbelief, or emphasis.
      • What a beautiful day! (Expressing strong admiration.)
      • What a shame! (Expressing disappointment.)
  4. Exclamation:

    • Expressing surprise or disbelief: Used as an interjection to show strong emotion.
      • What! You're leaving already? (Showing shock or disbelief.)
      • What? I can't believe it! (Expressing surprise.)
Usage Examples
  • Pronoun (Interrogative):

    • What do you want for dinner? (Asking for a choice of food.)
    • What is the capital of France? (Asking for factual information.)
  • Pronoun (Relative):

    • I remember what you said yesterday. (The thing that you said.)
    • He did what he was told. (The thing that he was instructed to do.)
  • Determiner:

    • What color is your car? (Asking for the specific colour.)
    • What kind of music do you like? (Asking for a category of music.)
  • Adverb:

    • What a clever idea! (Emphasising admiration for the idea.)
    • What nonsense! (Expressing strong disapproval.)
  • Exclamation:

    • What! You won the lottery? (Showing extreme surprise.)
    • What? That can't be true! (Expressing disbelief.)
Advanced Usage
  • "What about...?": Used to make a suggestion or ask for an opinion.

    • What about going to the cinema tonight? (Suggesting a plan.)
    • What about your brother? Is he coming? (Asking about someone's status.)
  • "What if...?": Used to ask about the consequences of a hypothetical situation.

    • What if it rains tomorrow? (Asking about a possible problem.)
    • What if we miss the train? (Considering a worst-case scenario.)
  • "What for?": Used to ask the reason or purpose of something.

    • What did you do that for? (Asking for the reason.)
    • What is this tool for? (Asking about its function.)
  • "What with... and what with...": Used to list multiple reasons or causes.

    • What with the rain and what with the traffic, we were late. (Because of both the rain and the traffic.)
Variants and Related Words
  • Whatever (pronoun/determiner): any or everything of a particular type; no matter what.

    • You can choose whatever you like. (Any thing that you like.)
    • Whatever happens, stay calm. (No matter what happens.)
  • Whatsoever (adverb): used for emphasis, meaning "at all".

    • I have no money whatsoever. (Absolutely no money.)
    • There is no doubt whatsoever. (No doubt at all.)
  • Whatnot (noun): used to refer to any of various things that are not specified.

    • She bought books, magazines, and whatnot. (And other similar items.)
Synonyms
  • Which: used to ask for a choice among a known set (e.g., ).
  • That which: a formal way to refer to something (e.g., ).
  • How: used to ask about manner or condition (e.g., ), but not interchangeable with "what".
Related Idioms
  • "Know what's what": to be knowledgeable or experienced about a situation.

    • He's been in business for years; he knows what's what. (He understands how things work.)
  • "What's the matter?": an expression asking what is wrong.

    • You look upset. What's the matter? (What is the problem?)
  • "So what?": a dismissive expression meaning "that is not important".

    • You're older than me. So what? (That fact does not matter.)
  • "What goes around comes around": a proverb meaning that actions have consequences.

    • If you treat others badly, what goes around comes around. (You will eventually face similar treatment.)
Phrasal Verbs
  • What for?: (already covered above) used to ask the reason.
  • What about?: (already covered above) used to make suggestions or ask for opinions.