The more specific term i.e., short for the Latin id est, means “that is.”

The initial letters are nearly always used just as we say id est = i.e.

Once upon a time, a lot of murphies—id est potatoes—were put in a pot together.

Something commendable in his disposition!—id est, not an absolute ruffian.

And it was at the purses of these that the blow would be struck—id est, at the most vital and fonder part of their beings.