Today in Chengdu I wanted to buy a replacement permanent marker pen for writing on cardboard.
I don't like nonpermanent markers because the ink can sometimes wipe off and stain your clothes. I find that in English the nonpermanent ones seem to be called whiteboard markers most often, and indeed that was written on most of the markers I could find in stores today.
But permanent markers were not easy to find and I found myself wanting to say something like "I want one of these but this is a whiteboard marker and I want a permanent marker".
These terms might not be considered basic enough vocabulary to be in most dictionaries. Google Translate translates them but I don't know if I can trust it.