You spell it Quiddich.
Quiddich is a sport by flying on broomsticks.
Lumos. Is the spell.
Anapneo is the spell that clears the airway, as demonstrated by Horace Slughorn on Marcus Belby in Harry Potter and the Half Blood Prince.
Digitalis is not a spell in Harry Potter.
Harry Potter's favorite spell was Expelliarmus (disarming spell) but he also used Stupefy (stunning spell) a lot.
Harry Potter doesn't use a spell to fly, he flies using an enchanted broomstick.
There is no weak spell in Harry Potter. It is only weak if they caster of the spell is weak. When you cast a spell say it loud and clear.
the spell is a charm
confundo is a spell in Harry Potter.