Perfidious — Meaning, Definition & Synonyms

adjective /(ˌ)pər-ˈfi-dē-əs/ per·fid·i·ous

Meaning & Definition of Perfidious

Perfidious (adjective)

  1. of, relating to, or characterized by perfidy

Perfidious (adjective) — Senses, Synonyms & Antonyms

  1. not true in one's allegiance to someone or something

    "a perfidious campaign worker revealed the senator's strategy to his leading rival for the nomination"

    similar: disloyal, faithless, false, fickle, inconstant, recreant, traitorous, treacherous, unfaithful, untrue
    related: irresponsible, trustless, undependable, unreliable, untrustworthy, faltering, hesitant, vacillating, wavering, dubious, irresolute, uncertain, apathetic, dispassionate, uninterested
    opposite: constant, dedicated, devoted, devout, down-the-line, faithful, fast, loyal, staunch, steadfast, steady, true
    near: dependable, dutiful, reliable, responsible, solid, tried, tried-and-true, trustable, trustworthy, trusty, unfaltering, unhesitating, unwavering, determined, intent, resolute, confirmed, dyed-in-the-wool, inveterate, sworn, ardent, avid, enthusiastic, fervent, fervid, impassioned, passionate

Synonyms, Thesaurus & Another Word for Perfidious

The most common words with a similar meaning to Perfidious:

disloyal, faithless, false, fickle, inconstant, recreant, traitorous, treacherous, unfaithful, untrue

Antonyms & Opposite Words for Perfidious

Words with the opposite meaning of Perfidious:

constant, dedicated, devoted, devout, down-the-line, faithful, fast, loyal, staunch, steadfast, steady, true

Related Words for Perfidious

irresponsible, trustless, undependable, unreliable, untrustworthy, faltering, hesitant, vacillating, wavering, dubious, irresolute, uncertain, apathetic, dispassionate, uninterested

Near Antonyms of Perfidious

dependable, dutiful, reliable, responsible, solid, tried, tried-and-true, trustable, trustworthy, trusty, unfaltering, unhesitating, unwavering, determined, intent, resolute, confirmed, dyed-in-the-wool, inveterate, sworn, ardent, avid, enthusiastic, fervent, fervid, impassioned, passionate

Word Forms of Perfidious

Derived words: perfidiously (adverb), perfidiousness (noun)

Origin & Etymology of Perfidious

First known use: circa 1538

Frequently Asked Questions about Perfidious

What does "Perfidious" mean?

"Perfidious" means of, relating to, or characterized by perfidy. As an adjective, it is defined as: of, relating to, or characterized by perfidy.

What is another word for "Perfidious"?

Other words for "Perfidious" include disloyal, faithless, false, fickle, inconstant, recreant, traitorous and treacherous. The best synonym depends on which meaning of "Perfidious" you intend.

What are different ways to say "Perfidious"?

There are 25 words and phrases with a similar meaning to "Perfidious". Common alternatives include disloyal, faithless, false, fickle, inconstant, recreant, traitorous, treacherous, unfaithful and untrue.

What is the opposite of "Perfidious"?

Antonyms of "Perfidious" include constant, dedicated, devoted, devout, down-the-line, faithful, fast and loyal. Near antonyms include dependable, dutiful, reliable and responsible.

How do you use "Perfidious" in a sentence?

Examples of "Perfidious" in a sentence: "a perfidious campaign worker revealed the senator's strategy to his leading rival for the nomination".

Is "Perfidious" a noun, verb, or adjective?

"Perfidious" is an adjective.

How do you pronounce "Perfidious"?

"Perfidious" is pronounced /(ˌ)pər-ˈfi-dē-əs/ and divided into syllables as per·fid·i·ous.

What is the origin of the word "Perfidious"?

First known use: circa 1538.