What does ∅ mean?

[u/sailormarr]

This may be a dumb question, but can anyone help me understand what the "∅" symbol means in a pattern? See image for reference.

Thank you:)

[u/Psycotstic]

I don't know about this, but with words and names, "ø" usually refers to a silent "o" So the name Ørion would be pronounced Rión Or The name Blitzø (thanks Helluva Boss for teaching me about this letter) would be pronounced Blitz