“+ adjective
Etymology: Middle English, from un- (I) + sound
: not sound: as
a.
(1) : not physically healthy or whole : unhealthy , diseased
an unsound limb
the teeth were unsound
especially : having a disease, abnormality, or defect of such a nature or to such a degree as to impair usefulness — used especially of a horse
(2) : not in good or edible condition : stale , rotten
poultry in a state of decomposition must be regarded as unsound — C.R.A.Martin
all unsound produce is refused at the market
(3) : not mentally sound or normal : not wholly or consistently sane
is said to be of unsound mind
b. : not morally sound : corrupt , evil
a strong nation cannot be built on an unsound people
c. : not firmly made, placed, or fixed
if pure copper … was cast thinly, the ingots proved unsound — John Craig
in detail design it was fundamentally unsound — O.S.Nock
d.
(1) : not based on logical reasoning or established fact : false , invalid , specious
it is doubtless unsound to argue that what can be done by the government in time of war can also be effected in time of peace — M.R.Cohen
contained exaggerated statements and unsound prophecies — W.O.Lynch
(2) : not based on proven practice, established procedure, or practical knowledge
the economic collapse … brought on by unsound banking and wild speculation in public utilities — American Guide Series: Nevada
the present arrangement is obviously a precarious and unsound one, dangerous to the long-term stability of the … area — G.F.Kennan
• un·soundly “+ adverb