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WORDNET DICTIONARY
CIDE DICTIONARY
OXFORD DICTIONARY
THESAURUS
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WORDNET DICTIONARY

Adjective treacherous has 2 senses

• treacherous(s = adj.all) unreliable - dangerously unstable and unpredictable; "treacherous winding roads"; "an unreliable trestle"
• treacherous(s = adj.all) perfidious, punic - tending to betray; especially having a treacherous character as attributed to the Carthaginians by the Romans; "Punic faith"; "the perfidious Judas"; "the fiercest and most treacherous of foes"; "treacherous intrigues"
Derived forms noun treachery₂, noun treachery₁

CIDE DICTIONARY

OXFORD DICTIONARY

THESAURUS

treacherous

Machiavellian, Punic, ambidextrous, artful, calculating, chancy, chiseling, collusive, covinous, crafty, crooked, cunning, dangerous, deceitful, deceptive, desultory, dishonest, disloyal, double, double-crossing, double-dealing, double-faced, double-minded, double-tongued, doublehearted, doubtful, dubious, duplicitous, faithless, false, false-principled, falsehearted, finagling, fraudulent, furtive, guileful, hairy, hazardous, indirect, infirm, insecure, insidious, insubstantial, jeopardous, misleading, perfidious, perilous, precarious, precariousness, provisional, recreant, risky, rocky, scheming, shaky, sharp, shifting, shifty, slippery, sneaky, surreptitious, temporary, tentative, ticklish, tottery, traitorous, trickish, tricky, two-faced, uncertain, undependable, underhand, underhanded, unfaithful, unfaithworthy, unhealthy, unloyal, unpredictable, unreliable, unsafe, unsolid, unsound, unstable, unsteadfast, unsteady, unsubstantial, unsure, untrue, untrustworthy, wicked, wily

ROGET THESAURUS

treacherous

Improbity

N improbity, dishonesty, dishonor, deviation from rectitude, disgrace, fraud, lying, bad faith, Punic faith, mala fides, Punica fides, infidelity, faithlessness, Judas kiss, betrayal, breach of promise, breach of trust, breach of faith, prodition, disloyalty, treason, high treason, apostasy, nonobservance, shabbiness, villainy, villany, baseness, abjection, debasement, turpitude, moral turpitude, laxity, trimming, shuffling, perfidy, perfidiousness, treachery, double dealing, unfairness, knavery, roguery, rascality, foul play, jobbing, jobbery, graft, bribery, venality, nepotism, corruption, job, shuffle, fishy transaction, barratry, sharp practice, heads I win tails you lose, mouth honor, dishonest, dishonorable, unconscientious, unscrupulous, fraudulent, knavish, disgraceful, wicked, false-hearted, disingenuous, unfair, one-sided, double, double- hearted, double-tongued, double-faced, timeserving, crooked, tortuous, insidious, Machiavelian, dark, slippery, fishy, perfidious, treacherous, perjured, infamous, arrant, foul, base, vile, ignominious, blackguard, contemptible, unrespectable, abject, mean, shabby, little, paltry, dirty, scurvy, scabby, sneaking, groveling, scrubby, rascally, pettifogging, beneath one, low-minded, low-thoughted, base-minded, undignified, indign, unbecoming, unbeseeming, unbefitting, derogatory, degrading, infra dignitatem, beneath one's dignity, ungentlemanly, ungentlemanlike, unknightly, unchivalric, unmanly, unhandsome, recreant, inglorious, corrupt, venal, debased, mongrel, faithless, of bad faith, false, unfaithful, disloyal, untrustworthy, trustless, trothless, lost to shame, dead to honor, barratrous, dishonestly, mala fide, like a thief in the night, by crooked paths, Int, O tempora!, O mores!, corruptissima respublica plurimae leges.

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