Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb undermine

2 senses of undermine

Sense 1
sabotage, undermine, countermine, counteract, subvert, weaken -- (destroy property or hinder normal operations; "The Resistance sabotaged railroad operations during the war")
       => disobey -- (refuse to go along with; refuse to follow; be disobedient; "He disobeyed his supervisor and was fired")

Sense 2
cave, undermine -- (hollow out as if making a cave or opening; "The river was caving the banks")
       => hollow, hollow out, core out -- (remove the interior of; "hollow out a tree trunk")