unflagging

It was his business acumen, his own unflagging zeal for the creative business solution, that had freed Sam to do this.

Often the reverie rolled on deep into the night, an unflagging, unredundant product of the raconteurial mind.

Perhaps no group has been as unflagging in its back of Israel than evangelicals in the U.S.

Last season he was a most devoted parent and looked after his family with unflagging care.

After all this exertion, he bore me with unflagging spirit into Lima, where we arrived at noon on the following day.

So awful was the pain that her mind seemed numbed; only an unflagging determination drove her on.

A steady climb with unflagging zeal and singleness of purpose always win out.

This work, as may be readily understood, demanded the most untiring vigilance and the most unflagging energy.