1. unsound

adjective. (ənˈsaʊnd) Not sound financially.
Synonyms
bad broken long risky wildcat unfit unwholesome injured high-risk speculative unhealthy damaged
Antonyms
uninjured unbroken healthy undamaged wholesome sound fit
Etymology
unsound (English)
sound (English)
sound (Middle English (1100-1500))
sounden (Middle English (1100-1500))
sonder (Old French (842-ca. 1400))
sund (Old English (ca. 450-1100))
un- (English)
on- (Middle English (1100-1500))
on- (Old English (ca. 450-1100))
ond- (Old English (ca. 450-1100))
un- (Middle English (1100-1500))
un- (Old English (ca. 450-1100))
unus (Latin)
oinos (Latin)

2. unsound

adjective. (ənˈsaʊnd) Not in good condition; damaged or decayed.
Synonyms
decayed rotted rotten corroded
Antonyms
sound goodness desirability soundness worthiness
Etymology
unsound (English)
sound (English)
sound (Middle English (1100-1500))
sounden (Middle English (1100-1500))
sonder (Old French (842-ca. 1400))
sund (Old English (ca. 450-1100))
un- (English)
on- (Middle English (1100-1500))
on- (Old English (ca. 450-1100))
ond- (Old English (ca. 450-1100))
un- (Middle English (1100-1500))
un- (Old English (ca. 450-1100))
unus (Latin)
oinos (Latin)

3. unsound

adjective. (ənˈsaʊnd) Of e.g. advice.
Synonyms
unreliable undependable
Antonyms
reliable dependable best
Etymology
unsound (English)
sound (English)
sound (Middle English (1100-1500))
sounden (Middle English (1100-1500))
sonder (Old French (842-ca. 1400))
sund (Old English (ca. 450-1100))
un- (English)
on- (Middle English (1100-1500))
on- (Old English (ca. 450-1100))
ond- (Old English (ca. 450-1100))
un- (Middle English (1100-1500))
un- (Old English (ca. 450-1100))
unus (Latin)
oinos (Latin)

4. unsound

adjective. (ənˈsaʊnd) Physically unsound or diseased.
Synonyms
bad unhealthy unfit
Antonyms
healthy better good favorable
Etymology
unsound (English)
sound (English)
sound (Middle English (1100-1500))
sounden (Middle English (1100-1500))
sonder (Old French (842-ca. 1400))
sund (Old English (ca. 450-1100))
un- (English)
on- (Middle English (1100-1500))
on- (Old English (ca. 450-1100))
ond- (Old English (ca. 450-1100))
un- (Middle English (1100-1500))
un- (Old English (ca. 450-1100))
unus (Latin)
oinos (Latin)

5. unsound

adjective. (ənˈsaʊnd) Suffering from severe mental illness.
Synonyms
mentally ill insane unstable
Antonyms
sane obedient advisability asset
Etymology
unsound (English)
sound (English)
sound (Middle English (1100-1500))
sounden (Middle English (1100-1500))
sonder (Old French (842-ca. 1400))
sund (Old English (ca. 450-1100))
un- (English)
on- (Middle English (1100-1500))
on- (Old English (ca. 450-1100))
ond- (Old English (ca. 450-1100))
un- (Middle English (1100-1500))
un- (Old English (ca. 450-1100))
unus (Latin)
oinos (Latin)

6. unsound

adjective. (ənˈsaʊnd) Containing or based on a fallacy.
Synonyms
invalid fallacious
Antonyms
valid unrepentant impenitent
Etymology
unsound (English)
sound (English)
sound (Middle English (1100-1500))
sounden (Middle English (1100-1500))
sonder (Old French (842-ca. 1400))
sund (Old English (ca. 450-1100))
un- (English)
on- (Middle English (1100-1500))
on- (Old English (ca. 450-1100))
ond- (Old English (ca. 450-1100))
un- (Middle English (1100-1500))
un- (Old English (ca. 450-1100))
unus (Latin)
oinos (Latin)
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