useful

In effect, he noticed the usefulness of our own inner guide.

Their usefulness may be regarded as a warrant of a wider adoption of them.

She jeopardises her life immediately and she generally deteriorates her capacity for future usefulness.

It had fallen in soft sand and, although damaged to some extent, had not lost its usefulness.

I can only hope that the translation will justify itself by its usefulness to the legal profession.

Of course a year's experience would increase my usefulness, but why not acquire it where the brethren want me?