tract + or --> tractor, ex + tract - extract, ex + tract + ion ---> extraction, at + tract - attract, attraction - at + tract + ion, sub + tract + ion - subtraction, dis + tract + ing - distracting, distraction - dis + tract + ion, con + tract - contract, contraction - con + tract + ion, pro + tract + or - protractor, re + tract - retract, retractable - re + tract + able, at + tract + ive - attractive, abs + stract - abstract,

<tract>

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