Brewing

Brewing is the act of creating potions using a Brewing Stand, that are consumed for various effects. Nether wart is brewed into a water bottle to make an awkward potion, the base of all others. Then an ingredient is brewed into said base to create a potion. Some reversed effects are theoretical, or replace the actual opposite effect.

See link for official table(s): https://minecraft.fandom.com/wiki/Brewing#Ingredients