: to take away (as one part or number from another) :deduct
Word Root of SUBTRACT
The Latin word tractus, meaning “pulled” or “dragged,” gives us the root tract. Words from the Latin tractus have to do with being pulled or dragged. To attract is to pull or draw towards you. To distract is to pull someone's attention away from something. To extract is to pull one thing out of another. To subtract is to pull a portion or number away from a group or from a whole.