"Old feuds" refers to long-standing arguments, conflicts, or fights between individuals, families, or groups that have existed for a significant period of time. Full definition
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Let's quit fanning the flames of old feuds and get on with reality. (hudsonvalleyone.com)
Miranda Otto appears as the gargoyle queen, caught up in a centuries - old feud with a demon army led by Naberius (Bill Nighy), who pledges to wipe humankind off the earth. (shepherdexpress.com)
For instance, family members often get drawn into the conflict, especially if it reignites old feuds. (humanrights.gov.au)