Verb undermine has 2 senses
  1. sabotage, undermine, countermine, counteract, subvert, weaken - destroy property or hinder normal operations; "The Resistance sabotaged railroad operations during the war"
    --1 is one way to disobey
    Sample sentence:
    Somebody ----s something
  2. cave, undermine - hollow out as if making a cave or opening; "The river was caving the banks"
    --2 is one way to hollow, hollow out, core out
    Sample sentences:
    Somebody ----s something
    Something ----s something
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