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Sometimes, we need to unlink domain from a website to put it down temporary for a couple of days. It is very simple to do.
Steps involved are different for all hosting providers.
If you are a GoDaddy customer, you can follow this link to complete it. It is very easy and once DNS propagation complete, you would be able to see your website not connected with hosting or website builder anymore.
If you are with Shopify, you can follow help article in order to do it. Here is the help article: https://help.shopify.com/en/manual/domains/remove-or-transfer-domains/removing-domains