adj. 25B6; adjective SPENDTHRIFT, thriftless, wasteful, prodigal, profligate, extravagant, free-spending, lavish, immoderate, excessive; imprudent, irresponsible, careless, reckless.
thrifty.
IMPROVIDENT
Meaning of IMPROVIDENT in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012