Synonyms of unsound in English:

unsound


See definition of unsound

adjective

1‘the tower is structurally unsound’

SYNONYMS

rickety, flimsy, shaky, wobbly, unstable, tottery, defective, disintegrating, crumbling, decaying, broken, broken-down, damaged, rotten, ramshackle, insubstantial, jerry-built, unsafe, unreliable, dangerous

NZ Australian informal rumpty

ANTONYMS

sound, strong

2‘this submission appears to us unsound on several grounds’

SYNONYMS

untenable, flawed, defective, faulty, ill-founded, flimsy, weak, shaky, unreliable, questionable, dubious, tenuous, suspect, illogical, irrational, unfounded, ungrounded, unsubstantiated, unsupported, specious, hollow, spurious, false, fallacious, fallible, erroneous, wrong, sophistic, casuistic

informal iffy

British informal dodgy

ANTONYMS

sound, strong

3‘of unsound mind’

SYNONYMS

disordered, diseased, deranged, disturbed, troubled, demented, unstable, unbalanced, unhinged, insane, crazed, distracted

informal touched

ANTONYMS

sane