The old man shows no sign of infirmity even though he is eighty years old.

The old man shows no sign of infirmity even though he is eighty years old. Correct Answer feebleness

Indolence : avoidance of activity or exertion; laziness.
Fickleness : changeability, especially as regards one's loyalties or affections.
Feebleness : a state of being very weak.
Firmness : the quality of having a solid, almost unyielding surface or structure.
Infirmity : physical or mental weakness.

Synonym of Infirmity is Feebleness

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