Rogets II: The New Thesaurus, Third Edition. 1995.
slippery
ADJECTIVE:
1. Characterized by or exhibiting evasion: elusive, evasive. SeeSEEK. 2. So smooth and glassy as to offer insecure hold or footing: lubricious, slick, slithery. Idioms: slippery as an eel. SeeSMOOTH.