You're careful about everyone else, but careless about your own safety.

The loss resulting from careless work is very serious.

He had been the target of constant attack during his life, and his personal foibles, careless dress and mental eccentricities were the theme of endless ridicule.

However, we knew a careless word overheard could spell our doom.

In Assam and in upper Burma there are extensive forests of Ficus elastica, but to a large extent the trees have been damaged by careless tapping.