además:
It is an adjective that can sustantivarse as indefinite pronoun meaning 'the other, the other, the other or the other, the other'. After the mention of a number of elements, appoints the remaining belonging to the same group as mentioned above, or the missing part of a whole.
As an adjective, it is preceded by an article or possessive prefix to plural nouns or collective
de más:
It is an adverbial phrase meaning 'to spare too much':
"What you are most in life is envy, hatred, resentment ..."
If the neutral article preceded it, it is opposed to the least and means 'the most important':
"The most important is to trust our friends."
"... Trust in God and in Senor Don Quixote, that you must give a kingdom, not an island.
So much the more as less said Sancho -; ... "(Cervantes, Don Quixote).
Also part of the buildings speak more ('say inconveniences') and being more ('spare room' or 'clutter'):
"He kept compromising documents for use against your partner if he spoke more"
"Perhaps in every marriage comes the day when the conversation is over and upset a pain in the mouth." (Augusto Casola, "The Sunken Cathedral")