arbitrary
capricious
careless
guileless
heedless
inadvertent
inconsiderate
reasonless
thoughtless
unaffected
unassumed
unassuming
unbeguileful
unbeguiling
undeceitful
undeceiving
undeceptive
undesigning
undisguised
undisguising
undissembling
undissimulated
undissimulating
unfeigned
unfeigning
unflattering
unguarded
unpretended
unpretending
unreasoning
unreflecting
unthinking
unthoughtful
untrimmed
unvarnished
free-handed
freehearted
inculcate
irreflective
munificent
overgreat
practical-minded
pump-handle
sailor-like
salt-of-the-earth
self-sacrificing
selfless
slave-boy
such
tooth-like
undistinguishing
unembodied
unfearing
unostentatious
unquestioning
unreflective
weak-handed
wonder-filled