What does this symbol mean?

A double sided arrow with a wavy line underneath/

I guess you mean OSM Carto style and ford icon:

https://wiki.openstreetmap.org/wiki/Key:ford
https://github.com/gravitystorm/openstreetmap-carto/pull/2743

Thanks. I couldn’t figure out how to attach an image to the post/

You can’t attach directly, though you can use imgur.com/upload and then paste a link.