"I’ve never thought they’re negligible," Dagny answered happily.
An unadmitted rage was boiling in his mind, struggling between escape and explosion, and it blew up into the sensation that this negligible little wife of his was depriving him of his triumph, that he would not surrender to her his new enjoyment.
There are no more uses of "negligible" in the book.
Show samples from other sources
The effect was negligible.
Those who disagree with the Kyoto Protocol insist that it will trade enormous resources for negligible benefits. Many proponents argue exactly the opposite.