negligent (adj.)
- apathetic
- approximate
- approximative
- ataractic
- beat-up
- bedraggled
- behindhand
- blase
- blowzy
- botched
- bungled
- careless
- casual
- chintzy
- delinquent
- derelict
- devil-may-care
- dilapidated
- disinterested
- dispassionate
- distracted
- distrait
- draggled
- easy
- easygoing
- feckless
- frowzy
- frumpish
- frumpy
- grubby
- happy-go-lucky
- heedless
- ill-advised
- ill-considered
- impolitic
- impotent
- imprecise
- improvident
- inaccurate
- inadvertent
- inattentive
- inconsiderate
- inconstant
- incorrect
- incurious
- indifferent
- inexact
- informal
- insouciant
- lackadaisical
- laissez-faire
- lax
- lenient
- listless
- loose
- lumpen
- messy
- mindless
- misguided
- murdered
- mussy
- neglectful
- nonchalant
- noncompliant
- nonconforming
- nonobservant
- nonrestrictive
- off-guard
- overindulgent
- perfunctory
- permissive
- poky
- ragged
- reckless
- regardless
- relaxed
- remiss
- ruinous
- scraggly
- seedy
- shabby
- shiftless
- shoddy
- slack
- slatternly
- slighting
- slipshod
- sloppy
- slovenly
- sluttish
- soft
- sordid
- spoiled
- squalid
- tacky
- tattered
- thoughtless
- thriftless
- unconcerned
- undiscriminating
- uneconomical
- unfaithful
- unguarded
- unheeding
- uninterested
- unkempt
- unmindful
- unobservant
- unrestrained
- unsightly
- unthinking
- untidy
- untrue
- unwary
- unwatchful
- weak
