Then, she dilated on the fearful hardship of having a father and mother strenuously opposed to her intended husband; on which unhappy circumstance she dwelt at great length; for the friend’s father and mother were quite agreeable to her being married, and the whole courtship was in consequence as flat and common-place an affair as it was possible to imagine.
There are no more uses of "strenuous" in the book.
Show samples from other sources
The doctor recommended strenuous exercise three times a week.
Landscaping is strenuous work in the Texas summer.