0 always determined and energetic in trying to achieve something and never willing to admit defeat: --
Annie was an indefatigable campaigner for better community services.
For many years Annie has been an indefatigable campaigner for human rights.
My indefatigable assistant was obliged to do the counting herself on my behalf.
He worships the land, he loves it, and in his own country he is an indefatigable worker on his own communally-held land.
He has been persistent; on some occasions he has been intransigent; but, above all, he has been indefatigable in his pursuit of that objective.
I yield to none in my admiration for his power of lucid statement, for his precision of thought, and for his indefatigable in dustry.
It was a pleasure to visit her constituency and join her in her indefatigable campaign on behalf her students.
Like so many others who have been indefatigable, persuasive, flexible and reasonable he has met his reward.
He has been indefatigable in his work, and we shall be very much the poorer for his loss.
It has been repeatedly introduced by an indefatigable band of warriors, and supported by all-party groups.