UNWISE
inexpedient, unwise
(adjective) not appropriate to the purpose
unwise
(adjective) showing or resulting from lack of judgment or wisdom; “an unwise investor is soon impoverished”
Source: WordNet® 3.1
Etymology
Adjective
unwise (comparative unwiser, superlative unwisest)
Not wise; lacking wisdom
Synonyms: injudicious, indiscreet, foolish
Antonyms
• wise
Source: Wiktionary
Un*wise", a. Etym: [AS. unwis. See Un- not, and Wise, a.]
Definition: Not wise; defective in wisdom; injudicious; indiscreet;
foolish; as, an unwise man; unwise kings; unwise measures.
Source: Webster’s Unabridged Dictionary 1913 Edition