Why would we have evolved such an elaborate communication if not to manage cooperation. In many social species, there is no sound-meaning learning or associating process. This understanding is not arbitrary. The social cooperative agreement of sound - meanings, is one of de Saussure's theses. Not sure I understand this.
Words are sound meanings.
Nobody's succeeded yet. If you assume they are arbitrary, then no you can't, but if there is meaning associated with sounds that are innate, then gaining perspective on the meanings of words is not impossible. Valuation' or 'commodification are' other applicable terms. It is used to preface things that we wish to indicate the social significance of. In our male dominated society.