Of or relating to something that is unreasonable.(adverb)
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Use "unreasonably" in a sentence
"Lengthening the term unreasonably, well past the author's death and perhaps for generations (as I have heard proposed), only creates resentment and backlash in the community that desires to appropriate for free."
"I think what most people view as conservatives holding on to the past unreasonably is their resistance to broad social changes, such as civil rights for blacks, marriage rights for different races and for gays, fighting reasonable environmental progress, and allowing women their full place in society."
"A husband cannot be called unreasonably dissatisfied whose wife tells him distinctly she is going to one place, and who sees her an hour after in company with the man he suspects at another."