Not prudent or wise; not recommended.
synonym: inadvisable.
Roget 647:
inexpedient,
undesirable;
unadvisable,
inadvisable;
objectionable;
inapt,
ineligible,
inadmissible,
inconvenient;
incommodious,
discommodious†;
disadvantageous;
inappropriate,
unfit
etc.
(inconsonant)
24.
ill-contrived,
ill-advised;
unsatisfactory;
unprofitable
&c.;
unsubservient
etc.
(useless)
645;
inopportune
etc.
(unseasonable)
135;
out of place,
in the wrong place;
improper,
unseemly.
clumsy,
awkward;
cumbrous,
cumbersome;
lumbering,
unwieldy,
hulky†;
unmanageable
etc.
(impracticable)
704;
impedient
etc.
(in the way)
706†.
unnecessary
etc.
(redundant)
641.
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Roget 649:
hurtful,
harmful,
scathful†,
baneful,
baleful;
injurious,
deleterious,
detrimental,
noxious,
pernicious,
mischievous,
full of mischief,
mischief-making,
malefic,
malignant,
nocuous,
noisome;
prejudicial;
disserviceable†,
disadvantageous;
wide-wasting.
unlucky,
sinister;
obnoxious;
untoward,
disastrous.
oppressive,
burdensome,
onerous;
malign
etc.
(malevolent)
907.
corrupting
etc.
(corrupt)
etc.
659;
virulent,
venomous,
envenomed,
corrosive;
poisonous
etc.
(morbific)
657†;
deadly
etc.
(killing)
361;
destructive
etc.
(destroying)
162;
inauspicious
etc.
859.
bad,
ill,
arrant,
as bad as bad can be,
dreadful;
horrid,
horrible;
dire;
rank,
peccant,
foul,
fulsome;
rotten,
rotten at the core.
vile,
base,
villainous;
mean
etc.
(paltry)
643;
injured
&c.;
deteriorated
etc.
659;
unsatisfactory,
exceptionable indifferent;
below par
etc.
(imperfect)
651;
illcontrived,
ill-conditioned;
wretched,
sad,
grievous,
deplorable,
lamentable;
pitiful,
pitiable,
woeful
etc.
(painful)
830.
evil,
wrong;
depraved
etc.
945;
shocking;
reprehensible
etc.
(disapprove)
932.
hateful,
hateful as a toad;
abominable,
detestable,
execrable,
cursed,
accursed,
confounded;
damned,
damnable;
infernal;
diabolic
etc.
(malevolent)
907.
unadvisable
etc.
(inexpedient)
647;
unprofitable
etc.
(useless)
645;
incompetent
etc.
(unskillful)
699;
irremediable
etc.
(hopeless)
859.
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Dutch: ongeraden
Polish: niewskazany