What is "resultless"

Usage examples of "resultless".

All he had to show for five years of digging and blasting is that resultless hole there and those damned upper chambers.

Sounds to me like Jacky is getting a little desperate over the flak from the home office about the resultless state of our expedition, but I dress and totter out to the street.

Life, we are told, is full of incompletion, of broken destinies, of failures, of romances that begin but do not end, of ambitions and purposes frustrated, of love crossed, of unhappy issues, or a resultless play of influences.