unsound
Not holding together
Unsound means not solid, reliable, or healthy.
An unsound structure is unsafe; an unsound argument has logical flaws; an unsound investment carries excessive risk.
The building was condemned as structurally unsound.
Of a person's mind, unsound suggests mental instability: of unsound mind.
The word often appears in formal or technical assessments.
Without legal force
- fallaciousContaining faulty reasoning
- flawedHaving faults or imperfections
- faultyHaving defects or errors
- speciousSuperficially plausible but flawed
illogical · baseless · unfounded · erroneous · unjustified · weak · spurious · unreliable
Prone to sudden change
- shakyTrembling or unstable
- ricketyUnsteady, liable to collapse
- wobblyTending to teeter
- unsafeLikely to cause harm
precarious · crumbling · dilapidated · decrepit · deteriorated · weakened · rotting · damaged
Failure or decomposition
- unstableProne to sudden change
- crisisDecisive dangerous moment
- disturbedEmotionally or mentally unsettled
- derangedMentally disturbed, irrational
unhinged · irrational · unbalanced · psychotic · neurotic · delusional · paranoid · manic
Involving possible harm
- insolventUnable to pay debts
- precariousDangerously insecure
- speculativeBased on conjecture
- unstableProne to sudden change
shaky · unreliable · dubious · questionable · bankrupt · failing · troubled · volatile
Harmful to wellbeing
weakened · impaired · deteriorating · declining · frail · failing · debilitated · morbid
invalid
Without legal force
- fallaciousContaining faulty reasoning
- flawedHaving faults or imperfections
- faultyHaving defects or errors
specious · illogical · baseless · unfounded · erroneous · unjustified · weak · spurious · unreliable · dubious
unstable
Prone to sudden change
unsafe · precarious · crumbling · dilapidated · decrepit · deteriorated · weakened · rotting · damaged · defective
breakdown
Failure or decomposition
- unstableProne to sudden change
- crisisDecisive dangerous moment
- disturbedEmotionally or mentally unsettled
deranged · unhinged · irrational · unbalanced · psychotic · neurotic · delusional · paranoid · manic · hysteria
risky
Involving possible harm
- insolventUnable to pay debts
- precariousDangerously insecure
- speculativeBased on conjecture
unstable · shaky · unreliable · dubious · questionable · bankrupt · failing · troubled · volatile · uncertain
unhealthy
Harmful to wellbeing
diseased · weakened · impaired · deteriorating · declining · frail · failing · debilitated · morbid · pathological
restless
Unable to be still
- fitfulIrregular and spasmodic
- disturbedEmotionally or mentally unsettled
- lightVisible electromagnetic radiation
broken · interrupted · troubled · shallow · poor · fragmented · disrupted · uneasy · wakeful · tossing
- structural conditionsintact, damaged, compromised, stable, unstable
- insanityinsane, crazy, mad, lunatic, insanity
- validityvalid, invalid, true, false, correct
- wood statesdried, dry, wet, green, raw
- mental statesknowledge, conscious, mood, anxious, memory
- moral judgmentsgood, evil, wicked, virtuous, moral
unsoundsound
Audible wave phenomenon
valid · logical · well-founded · well-grounded · cogent
- unsound mindMental incapacity for decisions