adj.
Pronunciation: - ' sau ̇ nd
Function: adjective
Date: 14th century
: not sound: as a : not healthy or whole <an unsound horse> b : not mentally normal : not wholly sane <of unsound mind> c : not firmly made, placed, or fixed <structurally unsound > d : not valid or true : INVALID , SPECIOUS < unsound beliefs>
– un · sound · ly \ - ' sau ̇ n(d)-l ē \ adverb