lizard (n.) Look up lizard at Dictionary.com
"an animal resembling a serpent, with legs added to it" [Johnson], late 14c., lusarde, from Anglo-French lusard, Old French laisarde "lizard" (Modern French lézard), from Latin lacertus (fem. lacerta) "lizard," a word of unknown origin, perhaps from PIE root *leq- "to bend, twist" [Klein]. Ending probably influenced by words in -ard.