attrition
at·tri·tion
noun \ə-ˈtrish-ən\Definition of ATTRITION
: the act of rubbing together; also : the act of wearing or grinding down by friction <attrition of teeth>
—at·tri·tion·al \-ˈtrish-nəl, -ˈtrish-ən-əl\ (audio pronunciation) adjective
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