资料来源 : Webster's Revised Unabridged Dictionary (1913)

Sneakiness \Sneak"i*ness\, n.
   The quality of being sneaky.

资料来源 : WordNet®

sneakiness
     n : a disposition to be sly and stealthy and to do things
         surreptitiously [syn: {furtiveness}, {stealthiness}]