7 letters · 12 points in Scrabble
noun any of various short-tailed furry-footed rodents of circumpolar distribution
originFrom Danish and Norwegian lemming, from Old Norse lómundr, læmingi, læmingr (“lemming”), perhaps from Sami luomek. Sense 2 derives from a longstanding myth that they exhibit so much herd mentality that populations jump off cliffs to their deaths together.
Etymology from Wiktionary, CC BY-SA 3.0