I want to have a box pop up around a word when I click under the word

I think that the above covers it. This technique could be used to underline a word during a presentation.

I think that the above covers it

I don’t think so. I can’t even imagine what “a box pop up around a word” might mean or look like, so some verbosity/mockup/reference to analogous function in another software would be nice.

Why even have a box if the goal is to underline the word?