carelessly
heedlessly
inconsiderately
indeliberately
involuntarily
lightly
negligently
permissively
remissly
scampingly
skimpingly
slightingly
slurringly
thoughtlessly
unadvisedly
uncalculatedly
undesignedly
unintentionally
unpremeditatedly
unreasoningly
unrigorously
unthinkingly
unthoughtfully
without premeditation
without willing
inadvert
inadvertent
advert
advertently