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Matthew 15:31 Insomuch that the multitude wondered, when they saw the dumb to speak, the maimed to be whole, the lame to walk, and the blind to see: and they glorified the God of Israel.
The Bible word translated “maimed” was an ancient medical word used to generally categorize certain physical handicaps. The word was used for visible birth defects or the result of tragic events affecting the arms or legs. These appendages might be usable to some degree, but were still “crooked” or shortened in some fashion. There would be no way to miss a handicap in this category because the word maimed only addressed the appearance of the limb. The word lame, slightly different than maimed, was used for unusable legs or feet.
Maimed was also used for amputees. (Mark 9:43) Records exist of accidental, military, and medical amputations dating back centuries before Christ. Also, there are medical manuals which contain amputation instructions dating as far back as 400 BC.
When Jesus healed the maimed, he literally added the missing section of an arm or leg, or he changed the appearance of an arm or leg which had been bent or shortened.