It was poor Mrs. Tulliver who had hastened this catastrophe, entirely through that irrepressible hopefulness of hers which led her to expect that similar causes may at any time produce different results.
And Tom was very unhappy; he felt the humiliation as well as the prospective hardships of his lot with all the keenness of a proud nature; and with all his resolute dutifulness toward his father there mingled an irrepressible indignation against him which gave misfortune the less endurable aspect of a wrong.
There are no more uses of "irrepressible" in the book.
Show samples from other sources
She catches my eye, an irrepressible grin spreading across her face.
Sabaa Tahir -- An Ember in the Ashes
Fitzy’s irrepressible voice is both sarcastic and welcoming, like he just can’t decide which way to go.