Miss

From Guild Wars Wiki

Whenever a player's attack misses, he or she will briefly see a yellow indicator text "miss."

Miss is an attack that fails to hit its target due to blindness, or by a skill that explicitly causes misses. Characters that are blind have a 90% chance to miss attacks.

Blocking, failing, and dodging are not the same as missing, although players may use the term "miss" to simply mean "did not hit."

Your projectiles will appear to stray off their course when you miss. They will either go to the left, or to the right, of the target if you miss.