unpermitted
unallowable
disallowable
unallowed
uninstructed
can't've
nonproper
unwanted
undesirable
unpartakeable
unimperative
cannet
non-prerequisite
fail
nonessential
unpermissible
unafforded
nonpermissible
rather than
divent
not
oughten
unbeclouded
uncantilevered
infeasible
noncantilevered
nonfeasible
noncommensal
unperformable
inessential
banned
impossible
undonnish
unentreated
unpredicatable
unvented
cannot but
nought
nonusable
incompliant
like one needs a hole in the head
unwillable
unusable
nonauthorized
escapable
nonrequisite
unprovisioned