incogitative
afterwit
noncontemplative
uncontemplative
unaware
nonthought
nonthinking
incogitancy
unthinking
uncogitating
unreflective
unthoughtful
vacuously
indifferently
mindless
light-minded
nonmental
simplicity
abstractedly
thoughtproof
nonlimerence
nonreticence
glib
silly
underimagined
notionlessness
uncollected
unforethoughtful
unmindful
untunefulness
forgetful
dump
uninterest
unbenevolence
remindless
thoughtless
sloppy-mindedness
anoetic
unsentient
mental block
nonurgency
pallidly
foolish
unaccommodative
imaginationless
vacant
unsuspenseful
brain-dead
few sandwiches short of a picnic
vacuous