What is to render useless by injury; to injure fatally; to ruin; to destroy; as, to spoil paper; to have the crops spoiled by insects; to spoil the eyes by reading called?

spoil — To render useless by injury; to injure fatally; to ruin; to destroy; as, to spoil paper; to have the crops spoiled by insects; to spoil the eyes by reading. (Webster's 1913.)

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