Unintentionally meaning

Alex had reason to know Josh could be rough unintentionally as well.

"Uncle, forgive me, I did that... unintentionally," he said, pointing to the broken sealing wax and pens.

But if they unintentionally placed obstacles in my way, I have the consolation of knowing that I overcame them all.

"What is it?" he said crossly, and, his hand shaking unintentionally, he poured too many drops into the glass.

It is of the familiar type of the replacing of the simple but wasteful by the complex and economical, and it was begun unintentionally in the attempt to save fuel and labour, by increasing the size and especially the height of the forge, and by driving the bellows by means of water-power.