Answer :
Final answer:
Significant darkening of the fingernails or toenails is known as onychomycosis, a fungal infection that affects the nails.
Explanation:
Significant darkening of the fingernails or toenails is known as onychomycosis. Onychomycosis is a fungal infection that affects the nails and can cause them to become yellow, brittle, and prone to breaking. This condition is relatively common among adults. It is important to seek medical treatment if you suspect onychomycosis, as it requires antifungal medication to treat.
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