negligent

As a noun recklessness

is the state or quality of being reckless or heedless, of taking unnecessary risks.

As an adjective negligent is

negligent (culpable due to negligence).

As adjectives the difference between negligent and wistful

is that negligent is negligent (culpable due to negligence) while wistful is full of yearning or longing.

As adjectives the difference between faulty and negligent

is that faulty is having or displaying faults; not perfect; not adequate or acceptable while negligent is negligent (culpable due to negligence).

As adjectives the difference between negligent and undefined

is that negligent is negligent (culpable due to negligence) while undefined is lacking a definition or value.

As adjectives the difference between negligent and easygoing

is that negligent is negligent (culpable due to negligence) while easygoing is (of a person) calm, relaxed, casual and informal.

As an adjective negligent

is negligent (culpable due to negligence).

As a noun apathy is

complete lack of emotion or motivation about a person, activity, or object; depression; lack of interest or enthusiasm; disinterest.

As adjectives the difference between accidental and negligent

is that accidental is not essential; incidental, secondary while negligent is negligent (culpable due to negligence).

As a noun accidental

is a property which is not essential; a nonessential; anything happening accidentally.

Mindless is a related term of negligent.

As adjectives the difference between mindless and negligent

is that mindless is showing a lack of forethought or sense while negligent is negligent (culpable due to negligence).

Dilatory is a related term of negligent.

As adjectives the difference between dilatory and negligent

is that dilatory is intentionally delaying (someone or something), intended to cause delay, gain time, or defer decision while negligent is negligent (culpable due to negligence).