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how (EN)
adverb, conjunction, noun

adverb “how”

how (more/most)
  1. to what degree or extent
    How loudly can you sing?
  2. by what means or method
    How did she manage to climb that high wall?
  3. for what reason
    How would I guess she's allergic to peanuts if she never told me?
  4. how good or how well
    How do I look? How does it sound? How did I do?
  5. under what name or title
    How should I refer to the new manager in my email?
  6. in what state or condition
    Hi, how are you?
  7. expressing surprise or delight
    How wonderfully you sing!

conjunction “how”

how
  1. describing the manner
    She showed me how she bakes her famous apple pie.
  2. in whatever manner or way
    You can decorate your room how you like; it's your personal space.
  3. expressing the idea of "that"
    He told me how he went to the cinema yesterday.

noun “how”

sg. how, pl. hows or uncountable
  1. the method or process involved
    When you try to make something complex, knowing the how is often more difficult than understanding the why.