By the way comment is the heart of the blogger because it builds a connection between the bloggers and the readers.
Follow the easy steps below
Step.1 Go to dashboard > Posts
Step.2 Search for the specific post, for which you want to hide the comment form.
Step.3 Edit the post and on the left list search for "Option" now in Reader Comments check on "Don't allow, hide existing" then click on done and update your post. Now comments are disabled for the selected post below.If you want to show comment box then select "Allow" in Reader comments.