< Portuguese Grammar

indefinite pronouns: algo, nada, tudo, cada

Called indefinite pronouns because they refer to things that are indefinite.

algo = something
nada = nothing
tudo = everything
cada = each

algo > Algo para beber? (Something to drink?)

nada > Nada faz sentido. (Nothing makes sense.)

tudo > Ele quer tudo! (He wants everything!)

cada > Ela sabe cada palavra. (She knows each word.)

You don’t need to modify these to agree with gender — they don’t change.