just eat a banana
you only use counter curses for curses. The most common spell blocking spell is Protego.
The Shield Charm, Protego may or may not be considered a counter-curse, but either way it serves to block certain spells from harming the user, and can also be used to separate people. One of the most commonly used counter-curses in the series is Finite Incantatem, normally simply said as Finite, which reverses the effects of many spells. Rennervate is also used, as a spell to revive those who have been hit by the Stunning Spell. Liberacorpus serves as the counter-spell to Levicorpus.
The truth is that there is no such thing as a spell or a curse - UNLESS YOU BELIEVE IT. Thus to break the spell or curse, simply stop believing in them.
Nox
Vulnera Sanetur was the song-like incant of a healing spell and counter-curse to Sectumsempra spell, both of which were invented by proffered Severus Snape.
the spell is a charm
The Cruciatus Curse is the torturing spell.
A curse placed on someone or something.
curse
Curse.
hex, curse
Avada Kedavra, the killing curse.