remiss
adjective
[ rɪˈmɪs ]
• lacking care or attention to duty; negligent.
• "it would be very remiss of me not to pass on that information"
Similar:
negligent,
neglectful,
irresponsible,
careless,
thoughtless,
heedless,
unthinking,
unmindful,
lax,
slack,
slipshod,
lackadaisical,
forgetful,
inattentive,
unheeding,
lazy,
dilatory,
indolent,
derelict,
sloppy,
delinquent,
barratrous,
disregardful,
oscitant,
Origin:
late Middle English: from Latin remissus ‘slackened’, past participle of remittere . The early senses were ‘weakened in colour or consistency’ and (in describing sound) ‘faint, soft’.