Transverse Waves: Why They Can't Travel Through Liquids

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rahuldg11
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Why transverse waves cannot travel through liquids ?
 
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A fluid (liquid or gas) is a substance that cannot support shear. So only pressure waves, which are longitudinal can traverse through a fluid.

However transverse surface waves can exist as you can witness at any shoreline.
 
What is the relation between transverse waves and shear?