slip·per·y

[slip-uh-ree, slip-ree]
adjective, slip·per·i·er, slip·per·i·est.
1.
tending or liable to cause slipping or sliding, as ice, oil, a wet surface, etc.: a slippery road.
2.
tending to slip from the hold or grasp or from position: a slippery rope.
3.
likely to slip away or escape: slippery prospects.
4.
not to be depended on; fickle; shifty, tricky, or deceitful.
5.
unstable or insecure, as conditions: a slippery situation.

Origin:
1525–35; alteration of slipper2; compare Low German slipperig; see -y1

slip·per·i·ness, noun
non·slip·per·y, adjective
un·slip·per·y, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source Link To slippery
00:10
Slippery is always a great word to know.
So is quincunx. Does it mean:
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
a gadget; dingus; thingumbob.
Collins
World English Dictionary
slippery (ˈslɪpərɪ, -prɪ) [Click for IPA pronunciation guide]
 
adj
1.  causing or tending to cause objects to slip: a slippery road
2.  liable to slip from the grasp, a position, etc
3.  not to be relied upon; cunning and untrustworthy: a slippery character
4.  (esp of a situation) liable to change; unstable
5.  slippery slope a course of action that will lead to disaster or failure
 
[C16: probably coined by Coverdale to translate German schlipfferig in Luther's Bible (Psalm 35:6); related to Old English slipor slippery]
 
'slipperily
 
adv
 
'slipperiness
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

slippery
1530s, from slip (v.) (cf. O.E. slipor "slippery"). Metaphoric sense of "deceitful" is first recorded 1550s; slippery slope first attested 1951.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
So our crew ditched their vehicles and walked back to camp on foot, crossing
  the river on a slippery log.
If you want to elevate a brain scan to social commentary, the meaning of the
  scan itself becomes slippery.
We are frequently asked how to correct a slippery wooden tread.
SA should really be careful about this slippery trend to preserve their
  credibility in these discussion about sustainability.
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