Added 9 October 2026 undermine /ˌʌn.dəˈmaɪn/ verb Categories: SocietyActionsUncommon Words In Latin: surruō Wiktionary verb ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about undermine at Wordnik → Where our words come from → Destroy property or hinder normal operations. The Resistance sabotaged railroad operations during the war Hollow out as if making a cave or opening. The river was caving the banks Related Words: sabotagesubvertcounteractweakencounterminecaveoverthrowsubtractthwartobstructinterferecircumvent Back to today's word