[kirubakaran]

> (how to make strikethrough...)

Unfortunately(?) you can't: https://news.ycombinator.com/formatdoc

[fsckboy]

this is how you make ̶s̶t̶r̶i̶k̶e̶t̶h̶r̶o̶u̶g̶h̶ ̶ words struck through [1]

[kernc]

You can use special a Unicode strikethrough glyphs such as available in https://efck-chat-keyboard.github.io