muscle is on the Basic English 850 List.
much - muscle - music

Pronunciation

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Singular
muscle

Plural
muscles

 
Arm and chest muscles
  1. (countable) A muscle is a part of the body of a person or animal. It's a part that pulls to make parts of the body move.
    He can lift heavy things because he has strong muscles.

Plain form
muscle

Third-person singular
muscles

Past tense
muscled

Past participle
muscled

Present participle
muscling

  1. To muscle is to use strength or muscles to do something.
    He muscled his way into the room between the people who were trying to stop him.
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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