Webster's English Dictionary

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deception

de.cep.tion \di-'sep-sh*n\ n [ME decepcioun, fr. MF deception, fr. LL 
   deception-, decep]tio, fr. L deceptus, pp. of decipere to deceive 1a: the 
   act of deceiving  1b: the fact or condition of being deceived  2: something 
   that deceives : TRICK  DECEPTION may or may not imply blameworthiness, 
   since it may suggest cheating or merely tactical resource; FRAUD always 
   implies guilt and often criminality in act or practice; DOUBLE-DEALING 
   suggests treachery or at least action contrary to a professed attitude; 
   SUBTERFUGE suggests the adoption of a stratagem or the telling of a lie in 
   order to escape guilt or to gain an end; TRICKERY implies ingenious acts 
   intended to dupe or cheat SYN syn FRAUD, DOUBLE-DEALING, SUBTERFUGE, 
   TRICKERY: