knee is on the Basic English 850 List.
kiss - knee - knife

Pronunciation

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Singular
knee

Plural
knees

 
A knee
  1. (countable) Part of the leg between the thigh and the shin.
    I hurt my knee in football.
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Plain form
knee

Third-person singular
knees

Past tense
kneed

Past participle
kneed

Present participle
kneeing

  1. To hit someone or something with the knee.
    He kneed me in the leg.


Parts of the leg (edit)

hip - thigh - knee - shin - calf


Parts of the body (edit)
head ears - eyes - eyebrow - nose - mouth - lips - tongue - tooth (pl. teeth) - cheeks - chin
torso neck - throat - shoulders - chest - breasts - ribs - abdomen - pelvis - back
internal organs heart - lungs - liver - stomach - kidneys - intestines - bladder - ovaries - uterus/womb
extremities arms - hands - fingers - legs - feet - toes
sex organs penis - vagina - testicle - ovary - vulva