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v.
refuse to acknowledge; disclaim knowledge of; responsibility for, or association with; "Her husband disavowed her after 30 years of marriage and six children"
v.
have a disagreement over something; "We quarreled over the question as to who discovered America"; "These two fellows are always scrapping over something"
v.
be engaged in a fight; carry on a fight; "the tribesmen fought each other"; "Siblings are always fighting"; "Militant groups are contending for control of the country"