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.
The general opposite of contraction is expansion, or possibly inflation. For muscles, the opposite of contraction is relaxation.
contraction
Contraction.
The contraction "you'll" rhymes with "cool."
The opposite of dilation in math is contraction
Won't is a contraction of the words 'will not', therefore the opposite is 'will'.
you'll
I'd
The opposite of expansion is contraction. For an activity where expansion is simply an increase, the opposite can be reduction.
The opposite of expansion is contraction. For an activity where expansion is simply an increase, the opposite can be reduction.
I'd which rhymes with wide.