Sneaky

//ˈsniːki// adj, noun, slang

Definitions

Adjective
  1. 1
    Elusive; difficult to capture or observe due to constantly outwitting the adversaries.

    "Catching those thieves will be hard: they're so sneaky!"

  2. 2
    Dishonest; deceitful.

    "They played a sneaky trick on us."

Adjective
  1. 1
    marked by quiet and caution and secrecy; taking pains to avoid being observed wordnet
  2. 2
    marked by deception wordnet
Noun
  1. 1
    Any device used for covert surveillance. slang

    "[…] in cooperation with the National Security Agency, installs and maintains "sneakies" throughout the U.S.S.R. and Communist China — but increasingly, denied areas are surveyed more simply."

Etymology

Etymology 1

From sneak + -y.

Etymology 2

From sneak + -y.

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