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arm is on the Basic English 850 List.
argument - arm - army
arm is one of the 1000 most common headwords.
argue - arm - around

Pronunciation change

Noun change

Singular
arm

Plural
arms

 
an arm
  1. (anatomy) One of the upper limbs people have; arms start at the shoulder and go down to the wrist, sometimes the hand is included.
  2. (usually plural) A weapon.

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Verb change

Plain form
arm

Third-person singular
arms

Past tense
armed

Past participle
armed

Present participle
arming

  1. To give or sell weapons to a person, group, or country.
    Our taxes pay to arm the military.
  2. To get a tool or a weapon ready for action; to activate.
    Remember to arm the alarm system.

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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