9 letters · 12 points in Scrabble
verb destroy property or hinder normal operations
verb hollow out as if making a cave or opening
originEtymology tree Proto-Indo-European *h₁én Proto-Indo-European *h₁entér Proto-Indo-European *(H)n̥dʰí Proto-Indo-European *-ér Proto-Indo-European *(H)n̥dʰér Proto-Germanic *under Proto-West Germanic *undar Old English under- Middle English under- English under- English mine English undermine From under- + mine.
Etymology from Wiktionary, CC BY-SA 3.0