a big bubble
Incendio!
Harry Potter and the Goblet of Fire
Glacius, for freezing water etc.
Impervius. it repels water :-)
Fera veto is not a known or mentioned spell in the Harry Potter series.If you meant vera verto, this spell is used for transfiguring animals into water goblets. Professor McGonagall demonstrates this spell in Harry's second year transfiguration class.
harry potter and the goblet of fire
gilly weed
eye of rabbit heart from home turn this water into rum (i think) x
you use a spell that you learn in the Herbology level (im stuck on the Voldemort level)
This is only really addressed in Harry Potter and the Goblet of Fire during the second Triwizard task. When Harry is underwater his spell that normally creates a spark comes out as a "jet of boiling water". But I'm sure different spells would look different.
Gillyweed. Its an herb that gives the user gills and fins for about 45 minutes
Expecto Patronum this spell is known as a Patronus charm.