“+ adjective
Etymology: Middle English, from un- (I) + thrifty
1. : marked by lack of thrift : of little value or effect in proportion to the effort or expenditure involved : unprofitable , wasteful
nothing is cooked, and nobody is warmed — a most unthrifty fire — Edna S.V.Millay
2. obsolete : dissolute , profligate
can no man tell me of my unthrifty son — Shakespeare
3.
a. : not thriving or prospering
an unthrifty tree
b. of livestock : lacking in vigor or bloom : constitutionally unsound
the intelligent buyer of choice feeders rejects all lambs that appear in the least unthrifty — W.C.Coffey
4. : not given to thrift or saving : extravagant , improvident , prodigal