Definition of "halfheartedly"

This appeal seemed to produce some effect, for two of the fellows began to look here and there among the lumber, but half-heartedly, I thought, and with half an eye to their own danger all the time, while the rest stood irresolute on the road.

1881–1882, Robert Louis Stevenson, Treasure Island, London, Paris: Cassell & Company, published 14 November 1883

“Oh, but I feel, and particularly just now—it’s your fault,” he said, pressing her hand—“that all that doesn’t count. I do it in a way halfheartedly. If I could care for all that as I care for you!... Instead of that, I do it in these days like a task that is set me.”

1901 , Leo Tolstoy, translated by Constance Garnett, Anna Karenina‎