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The general opposite of to contract is to expand.

In terms of Biology, an opening would dilate (widen) as opposed to contracting or narrowing in size.

For a muscle, the opposite of contract would be relax.

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โˆ™ 2012-11-20 05:29:36
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โˆ™ 2020-10-31 17:59:18
What about rendering to muscles?
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โˆ™ 2015-06-05 14:57:38

Expanding, if your "contracting" refers to shrinking in size.

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โˆ™ 2012-07-30 15:28:00

The general opposite of contraction is expansion, or possibly inflation.

For muscles, the opposite of contraction is relaxation.

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Q: What is the opposite of contraction?
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