knife is on the Basic English 850 List.
knee - knife - knot
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Pronunciation

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Singular
knife

Plural
knives

 
A few kitchen knives: chef's knife, bread knife, steak knife, and paring knife
  1. (countable) A knife is a tool that cuts.
    He ate with his knife and fork.
  2. (countable) A knife is a tool with a thin edge.
    He worked with a putty knife.

Plain form
knife

Third-person singular
knifes

Past tense
knifed

Past participle
knifed

Present participle
knifing

  1. (transitive) If you knife someone, you stab someone with a knife; you make a hole in them.
    The gang knifed him sixteen times.