What is the opposite of common sense?

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Contexts ▼▲ Noun Opposite of good sense and sound judgment in practical matters Opposite of common sense, or what is generally right, practical, acceptable or possible Adjective Opposite of based on, or displaying, common sense Opposite of not given to or confused by uncertainty or subtlety (especially in conduct or speech) Opposite of exhibiting good judgment and restraint … more ▼ ▲ Noun ▲ Opposite of good sense and sound judgment in practical matters imprudence indiscretion folly foolishness ignorance impracticality inability ineptness insanity stupidity unreasonableness rashness recklessness carelessness foolhardiness heedlessness injudiciousness irresponsibility impulsiveness haste incaution temerity incautiousness unwariness inadvisability improvidence inconsideration profligacy nonsense idiocy mindlessness silliness senselessness thing insensitivity Noun ▲ Opposite of common sense, or what is generally right, practical, acceptable or possible absurdity brainlessness denseness density doltishness dopiness dullness dulness dumbness fatuity feeblemindedness foolishness half-wittedness idiocy illogic illogicality illogicalness imbecility impracticality imprudence incoherence indiscretion injudiciousness irrationality ludicrousness nonsensicalness pointlessness preposterousness ridiculousness senselessness simpleness slowness stupidity unreasonableness bad judgment “His deep infatuation would cause him to behave in ways of complete irrationality.” Adjective ▲ Opposite of based on, or displaying, common sense unreliable groundless irrational nonsensical undependable uninformed untrustworthy disreputable erroneous fallacious dishonest illogical unproven flighty inadequate unrespected unsound capricious spurious unreasonable baseless insubstantial nonrational erratic gratuitous invalid unsubstantiated dishonourableUK dishonorableUS dodgy specious irresponsible nonvalid misguided unfounded unreasoned foundationless unjustified ill-founded not trustworthy without basis without cause without foundation without justification without reason wide of the mark “Some journalists are trustworthy, and some are just completely unreliable.” Adjective ▲ Opposite of not given to or confused by uncertainty or subtlety uncertain ambiguous fickle impractical capricious dubious insecure equivocal equivocating erratic indeterminate undetermined changeable torn volatile hazy questionable unreliable romantic unclear wavering irresolute undependable unstable fluctuating risky unsettled inconsistent precarious unpredictable irregular unknown vacillating fluid undecided unsure “It gave him perseverance, a quality sorely needed when he chose the uncertain life of an artist.” Adjective ▲ (especially in conduct or speech) Opposite of exhibiting good judgment and restraint imprudent injudicious unwise careless foolish inadvisable inexpedient irresponsible negligent foolhardy impulsive incautious misguided rash reckless thoughtless unsound hasty idiotical illogical improvident inept irrational silly unreasonable unreasoned crackbrained heedless ill-advised ill-considered impolitic overhasty scatterbrained shortsighted short-sighted tactless temerarious unadvisable unconsidered unreasoning unthinking ill-conceived ill-judged indiscreet off the deep end playing with fire “I would suggest that the imprudent decision would be to spend all of your money on a sports car.” Find more words! 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