/ˈneɡlɪdʒənt/

neg·li·gent

BrE /ˈneɡlɪdʒənt/

NAmE /ˈneɡlɪdʒənt/

(law or formal)

failing to give sb/sth enough care or attention, especially when this has serious results

The school had been negligent in not informing the child’s parents about the incident.

grossly negligent

(literary) (of a person or their manner)

relaxed; not formal or awkward

SYN nonchalant

He waved his hand in a negligent gesture.

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neg·li·gent·ly

BrE /ˈneɡlɪdʒəntli/

NAmE /ˈneɡlɪdʒəntli/

The defendant drove negligently and hit a lamp post.

She was leaning negligently against the wall.