infirmity

Infirm is a related term of infirmity.

As a adjective infirm

is weak or ill, not in good health.

As a verb infirm

is to contradict, to provide proof that something is not.

As a noun infirmity is

feebleness, frailty or ailment, especially due to old age.

As nouns the difference between ailment and infirmity

is that ailment is something which one; a disease; sickness while infirmity is feebleness, frailty or ailment, especially due to old age.

As nouns the difference between frailty and infirmity

is that frailty is (uncountable) the condition quality of being frail, physically, mentally, or morally; frailness; infirmity; weakness of resolution; liability to be deceived or seduced while infirmity is feebleness, frailty or ailment, especially due to old age.

As nouns the difference between feebleness and infirmity

is that feebleness is the quality or state of being feeble; debility; infirmity while infirmity is feebleness, frailty or ailment, especially due to old age.

As a noun infirmity

is feebleness, frailty or ailment, especially due to old age.

As a adjective bedridden is

confined to bed because of infirmity or illness.

Infirmity is a synonym of sickness.

As nouns the difference between infirmity and sickness

is that infirmity is feebleness, frailty or ailment, especially due to old age while sickness is the quality or state of being sick or diseased; illness; disease or malady.