thoughtless
abandoned
aimless
automatic
brash
casual
deserted
designless
desultory
disregarded
gut
half-done
haphazard
hasty
hit-or-miss
hotheaded
ignored
ill-advised
ill-considered
ill-contrived
ill-devised
ill-gauged
ill-judged
imageless
impolitic
imprudent
inadvertent
inadvisable
incautious
inconsequent
inconsequential
inconsiderable
inconsiderate
indeliberate
indiscreet
indiscriminate
inexpedient
injudicious
insensate
involuntary
irrational
laid aside
left undone
mindless
misadvised
misguided
missed
myopic
neglected
omitted
fight-or-flight
nonexistent
over-crowded
unacknowledged
unappreciated
uncollected
undiscovered
undreamed-of
unexperienced
unfelt
unguessed
unguessed-at
unheard
unimagined
unnoticed
unobserved
unrecognized
unrecorded
unreleased
unremarked
unremembered
unreported
unstudied
unthought-of