slippery
adjective
[ ˈslɪp(ə)ri ]
• (of a surface or object) difficult to hold firmly or stand on because it is smooth, wet, or slimy.
• "slippery ice"
Similar:
slithery,
greasy,
oily,
icy,
glassy,
smooth,
slick,
slimy,
wet,
slippy,
skiddy,
lubricious,
Origin:
late 15th century: from dialect slipper ‘slippery’, probably suggested by Luther's schlipfferig .
slippery slope
• a course of action likely to lead to something bad or disastrous.
• "he is on the slippery slope towards a life of crime"