unreasonable
aidless
baseless
defenseless
empty
exceptionable
fatherless
faulty
flawed
friendless
groundless
guideless
helpless
idle
ill-founded
illogical
implausible
impossible
inadmissible
indefensible
inexpiable
insupportable
intolerable
leaderless
motherless
objectionable
pregnable
specious
unacceptable
unbased
undesirable
unforgivable
unfounded
unfriended
ungrounded
unjustifiable
unjustified
unpardonable
unprotected
unsound
unsuitable
unsupportable
unsupported
unsustainable
unsustained
unwarranted
vain
vulnerable
weak
tenant
fallacious
impracticable
impractical
inaccurate
inapplicable
ineffective
irrelevant
mislead
powerless
unanswerable
unproductive
untrue
valueless
amenable
tenable
defensible