noun, plural in·fir·mi·ties for 1, 3.
Related formssu·per·in·fir·mi·ty, noun, plural su·per·in·fir·mi·ties.
Examples from the Web for infirmity
Alma Hitchcock, the times I saw her, was a frail, birdlike woman who looked angry about her infirmity.Alfred Hitchcock’s Fade to Black: The Great Director’s Final Days|David Freeman|December 13, 2014|DAILY BEAST
Mr. G. has an hereditary (I believe) infirmity of the mind, and is confined by his father in an asylum.A Rebel War Clerk's Diary at the Confederate States Capital|John Beauchamp Jones
Still, with the erring pride of youth she reproached herself with her infirmity of purpose.Charlemont|W. Gilmore Simms
Mr. Madison's want of health prevented; and Mr. Jefferson declined on account of age and infirmity.Memoirs of General Lafayette|Lafayette