negligent
behindhand
careless
culpably negligent
culpose
delinquent
derelict
disregardful
forgetful
heedless
inadvertent
inattentive
indifferent
laissez-faire
lax
loose
neglecting
noninterfering
nonrestrictive
off-guard
overly permissive
permissive
procrastinating
regardless
relaxed
remiss
scamping
skimping
slack
slighting
slurring
uncircumspect
unguarded
unrigorous
unwary
unwatchful
apathetic
callous
coldhearted
hard-hearted
improvident
inexact
insensitive
nonchalant
self-serving
slothful
thoughtless
unappreciative
uncaring
unenlightened
uninterested
unkind
unloving
unobservant
unsympathetic
wasteful
disrespectful
respectful
careful