tending or liable to cause slipping or sliding, as ice, oil, a wet surface, etc.

a slippery road.

tending to slip from the hold or grasp or from position

a slippery rope.

likely to slip away or escape

slippery prospects.

not to be depended on; fickle; shifty, tricky, or deceitful.

unstable or insecure, as conditions

a slippery situation.

adjective

dry , unslippery , certain , definite , reliable , stable

adjective

glac , glassy , glazed , glistening , greasy , icy , like a skating rink , lubricious , lustrous , perilous , polished , satiny , silky , sleek , slimy , soapy , unctuous , unsafe , unstable , unsteady , waxy , wet , cagey , changeable , crafty , cunning , devious , dishonest , duplicitous , elusive , evasive , false , fly-by-night * , foxy , inconstant , insecure , mutable , shifty , slick , slithery , smooth , sneaky , treacherous , tricky , two-faced * , unpredictable , untrustworthy , variable , eely , glib , incontinent , loose , lubric , oily , uncertain , unreliable