unsound (
http://definr.com/unsound)
adj 1: not in good condition; damaged or decayed; "an unsound
foundation" [ant:
sound]
2: not sound financially; "unsound banking practices" [ant:
sound]
3: containing or based on a fallacy; "fallacious reasoning";
"an unsound argument" [syn:
fallacious]
4: suffering from severe mental illness; "of unsound mind"
[syn:
mentally ill,
unstable]
5: physically unsound or diseased; "has a bad back"; "a bad
heart"; "bad teeth"; "an unsound limb"; "unsound teeth"
[syn:
bad,
unfit]
6: of e.g. advice
7: in deplorable condition; "a street of bedraggled tenements";
"a broken-down fence"; "a ramshackle old pier"; "a
tumble-down shack" [syn:
bedraggled,
broken-down,
dilapidated,
ramshackle,
tatterdemalion,
tumble-down]