careless

/ˈkɛərləs/

thoughtless; inattentive

He drove carelessly, not noticing the red light.

This shows a lack of attention while driving.

formal

Showing or feeling no care or attention; inattentive

A careless mistake cost them the game.

An error due to lack of attention

Often implies a lack of thought for others or for consequences

informal

Done without care or thought; haphazard

He has a careless attitude towards his studies.

He doesn't pay much attention to his schoolwork

Collocations

careless drivingdriving without attention or carea careless remarka comment made without thinking

Often used in contexts where lack of attention has negative implications

From 'care' (concern) + '-less' (without), Old English and Germanic roots

Used to describe actions or people lacking attention or concern for consequences

care

concern or worry

root

-less

without

suffix

English Dictionary