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To recede or recoil. The way the gums are shrinking back from your teeth is a clear sign of gingivitis. The child shrank back when we approached the house.
shrink from (someone or something)
1. To recede or recoil from someone or something. The way the gums are shrinking from your teeth is a clear sign of gingivitis. The child shrank from the men as they approached the house.
2. To avoid or neglect some action, duty, or responsibility. You wanted to lead this branch, which means you can't shrink from the thornier aspects of the job. We need someone who won't shrink from making tough decisions.
See also: shrink
To draw back instinctively, as in alarm; recoil: The dog shrank back in fear when I raised my hand.